[[quoteright:300:[[SaintSeiya http://static.tvtropes.org/pmwiki/pub/images/golden2.jpg]]]]
[[caption-width-right:300:...[[Theatre.JuliusCaesar and absolute power]] [[{{Pun}} glows absolutely.]]]]

->''"We're the Stone Protectors, now you know\\
Stone Protectors, our stones of power glow!"''
-->-- Theme song to ''WesternAnimation/StoneProtectors''

Power glows. The more power, the more glow. So, anything that glows is [[PowerMakeover automatically presumed to be superior]] to otherwise identical things that don't glow, and more glow is better. This is closely related to the RuleOfCool because glowing is cool, so things that glow automatically get more WillingSuspensionOfDisbelief, allowing them to be more unrealistically powerful. They're often GoodColorsEvilColors, too. For example, evil glows bright red, good glows blue or gold, and [[SicklyGreenGlow radioactive materials glow green]].

GlowingEyesOfDoom? Inherently superior to ordinary, everyday, garden-variety eyes of doom. Glowing BattleAura? Opponents who don't glow won't stand a chance! Any physical object that glows will also be powerful somehow. [[LaserBlade Glowing sword]] vs. boring sword? Glowing sword wins, every time. [[StuffBlowingUp Explodey things]] that emit a [[PreExplosionGlow glow first]] are bigger, louder and/or do more damage, and if they were SuckingInLines first, they're even more so. The most powerful magical potions will also glow to signify their superiority over ordinary, non-glowing magical potions. And don't forget the inherent awesomeness of the PillarOfLight, which is Glow going to Heaven just to show how overwhelming it is.

Strangely enough, in real life glowing would usually indicate a wasting of energy, but it could still count as just the excess energy manifesting as light. A good example is in Mercedes Lackey's Velgarth series in which Gates and Portals only glow when energy is being used inefficiently.

SuperTrope to BattleAura, HolyHalo, VolcanicVeins, and PhosphorEssence. See also: PowerCrystal, PowerEchoes, PowerFloats, PowerMakesYourVoiceDeep, PureEnergy, HolyBacklight, BackgroundHalo and FamilyFriendlyFirearms. PreExplosionGlow, StarSpangledSpandex, ThroatLight, and SuckingInLines are special cases of this trope. In media with audio, this is commonly a WhiningLight. Very often overlaps with PowerupFullColorChange.

If only certain people are aware of the glow you could be looking at EditorialSynaesthesia or even AuraVision. May be used as a FantasticLightSource as MundaneUtility.

As one final note, [[TelevisionIsTryingToKillUs DO NOT rely on this trope to determine danger]] in RealLife. People have been killed from touching downed power lines that aren't glowing or sparking but still have enough charge to electrocute anyone who touches them, and permanently disabling to lethal levels of radiation can be present without any visual signs at all (which is why Geiger counters and dosimeters exist!)
----
!!Examples

[[foldercontrol]]

[[folder:Anime and Manga]]
* Shinsoo, the AppliedPhlebotinum in ''TowerOfGod'', glows when it is used in it's most basic form. That means, [[ZigZaggedTrope the more advanced and dangerous a technique is, the less it glows]].
* In ''Manga/{{Akira}}'', at the moment of the greatest release of energy, everything is reduced to a bright white. Maximum glow for maximum power.
* As the trope image shows, the holy Gold Clothes(armors) from ''SaintSeiya'' sometimes glow...very much so.
* Gourry in ''LightNovel/{{Slayers}}'' has an extremely powerful Sword of Light, much better than any other regular swords. He can chop through ''trees'' with his sword, and we're not talkin' fist-width saplings, either. [[ShoutOut It also makes lightsaber noises]].
* Everything that has some sort of spiritual nature in ''EarthMaidenArjuna'' gives off an awesome glow. Including Juna's MagicalGirl transformation, as well as her energy bow Gan Deeva.
* ''FateStayNight'' has Excalibur, the "ultimate weapon of humanity", able to convert the user's {{Mana}} into light energy and fire it as a destructive wave. Since it takes in the user's own power, it also [[GoodColorsEvilColors changes color according to alignment]].
** Ea, Gilgamesh´s EX+++ Noble Phantasm turns the winds it sends out red.
* Some ''InitialD'' characters can tell roughly how good another driver is by the glowing aura around the driver and by extension, his car when the person is driving it.
* ''Anime/YuGiOh!'' does this for several reasons. Spell and Trap cards glow whenever their effects come into play as well as various monster attacks. Millenium items often glow in order to show they are being activated. Noteworthy glows come from whoever is summoning God cards.
* ''Anime/YuGiOh5Ds'' does this very frequently. Shooting Star Dragon is in constant glow mode and is only ever seen once without it. The final battle with ZONE has Yusei [[spoiler: tune all 5 of his friends' dragons into Shooting Quasar Dragon]], the most overly glowing transformation sequence in the series, as it involves Yusei and his D-wheel going fully gold. One might be able guess it has whole arsenal of effects ready to beat ZONE's [[TheJuggernaut Timelords]] like they were nothing.
* Many attacks in ''Anime/{{Pokemon}}'' glow (insert color here) before making things explode and blast off (Iron Tail, Focus Punch, Bubblebeam, etc).
** Within the [[TabletopGame/{{Pokemon}} TCG]], Holographic cards are generally considered to be powerful, or at least rarer than their non-holographic counterparts.
* The 2003 series of ''Anime/AstroBoy'' explains this by giving the titular robot a kind of [[AppliedPhlebotinum surge-protector that somehow converts excess electricity into photons]].
* Used in the ''SuzumiyaHaruhi'' Brigade-movie "The Adventures Of Mikuru Asahina", just like any other cliche-trope. When Koizumi's power is released, he glows blue-ish. Interestingly though, it does not appear to be the comically used SpecialEffectFailure, like with the Mikuru-Beam.
* If you notice yourself being bathed in a soft, pink light in ''MagicalGirlLyricalNanoha'', that is your signal to run fast, and run far, as that soft light won't stay soft for long for it comes from the massive pink glow that precedes Nanoha's [[WaveMotionGun Starlight Breaker]].
** If you find yourself in a similar situation in DragonballZ, you're about to be blown up by Majin Buu. Generally speaking, soft, pink light is best avoided in Anime.
* Performing alchemy causes stuff to glow in ''Manga/FullmetalAlchemist''. This is actually used as a small plot point when Ed realizes that he and Al can't use alchemy to sneak into the fifth laboratory, as the guard would see the glow.
* ''Manga/{{Bleach}}'' will sometimes use this trope to display the power upgrade the release of a shinigami's zanpakutou or an arrancar's resurrecion may cause.
* GetterRobo has this for Getter Rays use. Most designs of Getter-1 even include several clear panels on the face and some on the chest and limbs so they can light up when it's time to kick ass.
* ''DragonballZ'' may not be the [[UrExample oldest example]], but it might be [[TropeCodifier the definitive one]].
** Actually inverted in the Android saga. The titular androids - cyborgs more powerful even than Frieza - are shown as extreme threats, despite their lack of any glow at all. In fact, Androids 17 and 18 are for a short time the two strongest beings in the DBZ universe, the latter totally trouncing the very glowy, newly Super-Saiyan Vegeta.
*** This is because the glowing BattleAura is a product of [[KiAttacks ki energy]], the source of nearly all DBZ fighters' superhuman powers. All, that is, except the Androids. The fact that their power is so different in nature was part of what made them so dangerous: all of the heroes can sense powerful ki from miles away, but one of the Androids could be standing right behind them and they wouldn't even know it. [[spoiler:Which is exactly what happens to [[ButtMonkey Yamcha]]. The results include a fist-shaped hole from his back to his chest.]]
** Inverted again in the Buu saga. When Gohan achieved a new level of power beyond the glowy Super-Saiyan or even the glowier and sparky Super-Saiyan 2, his hair remained black and had almost no battle aura to speak of.
** In DragonballGT, both Goku and Baby as Great Apes have a golden, glowy aura and fur. Seeing as this is basically Super Saiyan Great Ape, it makes sense.
* The finale of the third arc of ''{{Robotech}}'' and during ''WesternAnimation/RobotechTheShadowChronicles'', where Ariel glows whenever she's using creepy Invid powers.
* [[OnePiece Luffy's]] Gear Second gives his body a bright red glow. Yeah it's high-pressure blood in his body but it's still glowing. Also, Sanji's Diable Jambe (Devil's Leg) makes his foot glow a bright red.
** Partially justified, because the idea of the attack is that he's heating up his leg with friction (without tearing his skin or clothes to shred). The heat then glows, like a toaster coil.
** It should be noted, one of the most powerful Marines, Admiral Kizaru, literally turns into light.
* The "Shining Finger!" attack from ''GGundam''.
** Not to mention all Shuffle Alliance members' [[SuperMode Hyper Modes]], which turn their HumongousMecha into glowing gold incarnations of ass-kicking.
* ''[[Anime/MobileSuitGundam00 Gundam 00]]'' has the Gundams glow red and pink when they activate their Trans-Am systems.
* Both ''[[Anime/MobileSuitZetaGundam Zeta Gundam]]'' and ''[[Anime/MobileSuitGundamZZ Gundam ZZ]]'' had effects from the pilots resonating with their titular Mobile Suits' main device, the Bio-Sensor, making them glow pink and allow them to do kick-ass stuff.
* In ''MobileSuitGundamCharsCounterattack'', The Nu Gundam's Psycoframe gives off a green glow when Amuro's Newtype powers start to overload it.
* The same happens in GundamUnicorn: the full Psycoframe under the RX-0's armour glows whenever its NT-D is activated. Its colour depends on the strength of the Newtype's abilities.
* Once every 22 years in ''MahouSenseiNegima'', the WorldTree in Mahora glows with a brilliant light. This is from the magical energy within accumulating to the point where it overflows. When it's like this, it could grant wishes of the heart, from something as simple as making someone fall in love with you to [[spoiler:[[TheUnmasquedWorld convincing the entire world that magic exists]]]].
* The ''RebuildOfEvangelion'' movies introduce this in spades. The most obvious example is what happens to Unit-01 at the end of the second movie: it starts going berserk and gets the usual GlowingEyesOfDoom. But so does its pilot. And the mecha's fluorescent green parts starts glowing sickly red. As well as the inside of its maw. [[spoiler: Then it rebuilds its amputated arm as a glowy, proteiform appendage, grows a halo, shoots EyeBeams left and right and lose its armour only to reveal glowing white patches beneath it. By the time the credits flash, it has become a giant glowing figure of pure white.]] Unsurprisingly, its opponent is [[CurbStompBattle unable to resist such a brilliant display]].
* ''DarkerThanBlack'' is rather fond of this trope. Contractors using their powers glow blue (identified as Cherenkov radiation), and their [[GlowingEyesOfDoom eyes]] start shining [[RedEyesTakeWarning red]]. Even more extreme when [[spoiler:Hei gets a bit upset near an AmplifierArtifact]], which makes the entire ''neighborhood'' glow.
* In ''Manga/{{Naruto}}'', the titular character, as well as his fellow [[SealedInsideAPersonShapedCan jinchuuriki]], are engulfed in a glowing aura of chakra when in their demon forms (except Gaara, he gets covered in sand). This [[DemonicPossession takes the form of the jinchuuriki's demon]] after the initial stage, at which point it is often time to [[UnstoppableRage run]] [[SuperpoweredEvilSide away.]] Of course, there IS a threshold past which the aura disappears in exchange [[BodyHorror for]] [[OneWingedAngel something]] [[http://www.mangareader.net/93-444-13/naruto/chapter-439.html far worse]]...
** This is lampshaded when [[spoiler:Naruto's controlled form of the Nine-Tails' chakra]] is [[MundaneUtility used as a flashlight.]]
** The Fourth Raikage (A)'s ''Raiton: Yoroi'' (Lightning Armor) cover his body in lightning.
* In Manga/YuYuHakusho, B Class and higher beings like Toguro, Yusuke, Bui, and Sensui often display bright auras when either manifesting their full power or when using a powerful attack. Especially powerful auras can cause adverse things to the wielder's surroundings: Toguro's can disintegrate anything drastically weaker than him, and the combined power of Sensui's [[spoiler:Sacred Energy]] and Yusuke's [[spoiler: new-found demonic power]] created massive earthquakes and twisters strong enough to kill A-Class beings in an instant.
* Then there's the ultimate attacks of the titular SuperRobot in GaoGaiGar: [[YinYangBomb Hell and Heaven]] has one fist glowing red and the other glowing yellow, while using the [[DropTheHammer Goldion Hammer]] results in the entire robot glowing gold. This is then taken UpToEleven in the OVA ''FINAL'', where they introduce [[spoiler: the world's biggest ban hammer that has a head several magnitudes larger than the handle and is made up of nothing but pure, glowing energy]].
* The [[RuleOfCool Spiral Energy]] of Anime/TengenToppaGurrenLagann. While the glowing energy powered by [[HotBlooded Fighting Spirit]](aka. [[RatedMForManly Pure Manliness]]), is present from the first episode, it reaches new extremes nearly every other episode, until by the end, the main characters are piloting [[spoiler: a {{Humongousmecha}} 100 times the size of THE MILKY WAY GALAXY, which is not even actually a machine but a materialization of Spiral Energy. Its energy-based nature is shown by the fact that the torso of the mecha is mostly comprised of a flaming, glowing mass Spiral Energy. ]]
* {{Arago}}
* In ''TigerAndBunny'', [[DifferentlyPoweredIndividual NEXT]] glow blue when they use their powers. Except for the members of Ouroboros, who glow orange [[ColorCodedForYourConvenience because they're totally evil.]]
* In Anime/PuellaMagiMadokaMagica, Madoka, as a MagicalGirl, glows brightly enough you could mistake her for the sun in a few scenes.
* During key battles in Anime/DigimonAdventure digimon will sometimes start glowing with holy power.
* Subverted in ''Manga/RisingXRydeen''. Takara gets worried when Golden Lion King starts roaring and glowing brightly. Takara thinks he's about to use a powerful attack but MissionControl reveals to Takara that it's actually just Golden Lion King's power, roaring makes him glow.
[[/folder]]

[[folder:Comic Books]]
* Pretty much a common trope in comics, especially as regards PsychicPowers. One should apparently be able to spot a telepath with ease thanks to the glowing energy field that emanates from their heads and usually flows out from them around the heads of those that they are using their powers on. Telekinesis likewise tends to consist of a colored energy field surrounding the affected objects. This does however depend somewhat on artistic preference of the creators:
** This has become more and more common over the years in MarvelComics, to the point where virtually any use of a super power will glow, even if the energy involved (magnetic, psionic, etc.) should not be visible to the naked eye. Justified due to RuleOfPerception (i.e. the glow is the visual cue to the reader that something is happening.)
*** Amusingly, this one tends to vary a great deal with the depiction of the Invisible Woman of the ''ComicBook/FantasticFour''. Often her force fields, which are supposed to be invisible, were drawn with dotted lines or shading so that the reader knew where they were, even while it was presumed that characters could not see them. This invisibility was used dramatically during John Byrne's run, where the identity of the super-villain Malice and her powers were a mystery as she systematically took down the members of the team using completely unseen forces. It is only when Daredevil, who "sees" via a radar sense, shows up and asks about the "amorphous blob" they are fighting that they realize that it is Sue and her invisible force fields, thus saving the team from another ReedRichardsIsUseless incident. More recent depictions, however, sometimes show Sue's power as a crackling energy field, not unlike those of other psionic characters.
*** In the early days of the ''ComicBook/{{X-Men}}'' comics, the powers of characters like {{Magneto}}, Marvel Girl and Professor X were often depicted with wavy lines, implying that they were not visible to others characters. Now they cannot seem to use their powers without unleashing incredible amounts of glow. This has been especially true whenever Jean (or anyone else) is channeling the Phoenix Force. In that case just performing a simple mindlink will result in actual ''flames'' flowing between them and the other person.
** Notably inverted in some ValiantComics prior to the takeover by Acclaim. Powerful [[PsychicPowers psionics]] such as Toyo Harada and Peter Stanchek gave off no glow even when performing massive feats of power such as levitating large objects or ripping apart buildings. However, this trope was very much in force with [[AGodAmI Solar and Mothergod]], whose power to manipulate all forms of energy was usually accompanied by geometric patterns of rainbow light.
* ''[[Comicbook/{{Doom}} Doom Comic]]'': "[[MightMakesRight Might makes]] light." '''''BLAM!''''' ''CLA-CLACK'' "And I feel mighty!" '''''BLAM!'''''
* ''ComicBook/ImmortalIronFist'': the titular character's fist glows when he summons his chi.
* The constructs of the ''[[GreenLantern Green Lanterns]]'' are all made of glow.
** Literally; in ''TheSandman'' graphic novel ''Endless Nights'', an Oan precursor of the Guardians of the Universe manipulates a primitive form of Green Lantern energy which she calls "the Glow". Her name? Killalla of the Glow.
* In ''PowerPack'', Katie's (Energizer) power causes her to glow when she absorbs... just about anything; she's also able to shoot energy balls. The brighter the glow, the more power she has stored up.
* Played for laugh in the French comic ''Dungeon Zenith vol. 2: The Barbarian Princess'': the hero asks its speaking sword whether it has special powers. Yes: it glows in the dark. Enough to make him a target, not enough to be used as a light.
* Comicbook/DoctorStrange typically has a glow around his hands when spellcasting.
* In ''ComicBook/AllFallDown'', Siphon exhibits this to a blinding degree [[spoiler:shortly before she dies]].
* TheSentry is not called 'The Golden Guardian of Good' for nothing.
[[/folder]]

[[folder:Fan Fiction]]
* The fact that the protagonist of [[Fanfic/DragonAgeTheCrownOfThorns this]] particular ''Franchise/DragonAge'' fanfiction gets his magic [[spoiler:from a fairly unstable tear in the Veil, which he has in his body,]] means, among other things, that he starts glowing white whenever he does something unusual, either just from the eyes or his whole body, up to looking like a [[Series/StargateSG1 Stargate ascended ancient]].
* In ''Fanfic/KeepersOfTheElements'', the Keepers often have [[ColorCodedElements colour-coded]] power glows when casting spells. Other magical beings also have glows when casting spells.
[[/folder]]

[[folder:Films -- Animated]]
* In the second ''Anime/{{Pokemon}}'' movie, to save Lugia, the three legendary bird Pokémon, and resolve all conflict, Melody had to play a tune on what looked like some sort of ocarina. The stones she played it next to glowed depending on what note she used, and then glowing water came out from nowhere and entered into the sea.
* This happens to Cartman in ''WesternAnimation/SouthParkBiggerLongerAndUncut'' once he harnesses the power of his malfunctioning V-chip.
* In ''Disney/{{Tangled}}'', Rapunzel's golden hair glows whenever she uses its powers of healing and immortality. She manages to take advantage of this when she and Flynn get trapped in a flooding cave and need to find a way out.
-->''Flower, gleam and glow\\
Let your power shine.''
* In ''WesternAnimation/{{WALL-E}}'', not only does EVE glow very faintly (the better to invoke a GaussianGirl), her presence and touch cause electrical lights to glow as well.
[[/folder]]

[[folder:Films -- Live-Action]]
* The lightsabers in ''Franchise/StarWars'' are the logical conclusion of this phenomenon. No other weapon can beat a sword that's actually ''made'' out of glow!
* In the 1985 film ''Film/TheLastDragon'', there is The Glow: when a fighter's hands glow, he is among the best in the world - when his entire body glows, he IS the best. Sho'Nuff, the Shogun of Harlem, demonstrates the former towards the end of the movie, but Leroy "Bruce Leroy" Green demonstrates the latter after a beatdown.
* Tony Stark's arc reactor in the ''Film/IronMan'' movies glows ''very'' blue. Very vaguely justified in that it is producing electrical energy, and that whatever reaction happens in it might give off Cherenkov radiation. As for the repulsors... the workings of a palm-sized rocket/energy weapon are anyone's guess.
* From the same continuity as the above: The [[MacGuffin Tesseract]] from ''Film/CaptainAmericaTheFirstAvenger''. At the start of the film, Johann Schmidt comes across the artifact buried in the tomb of a Norwegian warrior, but we know it's fake because it ''doesn't'' glow. The ''real'' one, on the other hand, is like a small star. The glow extends to Arnim Zola's Tesseract-powered weapons as well, all of which carry luminous blue power packs.
* In ''Film/PulpFiction'', the contents of the [[MacGuffin briefcase]] is never shown, but whatever it is [[PowerGlows glows]].
* ''Franchise/IndianaJones'':
** Played straight in ''Film/IndianaJonesAndTheTempleOfDoom'' with the stones of power that glow when they are together. (And get very hot, by the way)
** Inverted in ''Film/IndianaJonesAndTheLastCrusade'', where the actual Holy Grail is the most mundane-looking wooden cup yet the gold-colored lining of the True Grail makes it appear to glow from the inside.
* The reagent in ''Film/ReAnimator'' is not only a fine example of TechnicolorScience, but also glowy.
* In the film of ''Film/HarryPotterAndThePhilosophersStone'', a glow surrounds Harry when his wand chooses him. (A slightly different thing happened in the book.)
* Franchise/{{Godzilla}}'s dorsal fins flash or glow (depending on the film) when he's preparing to unleash his [[BreathWeapon atomic ray.]]
* In ''Film/{{Stardust}}'', [[spoiler: Yvanne defeats Lamia when she glows blinding whilst hugging Tristan]]
* In ''Film/{{Contact}}'', the Machine glows when it's turned on to demonstrate that Crazy Alien Technology Stuff Is Happening. The glow increases as the machine picks up speed.
* In ''Film/XMenOriginsWolverine'', everything Gambit charges glows pink.
[[/folder]]

[[folder:Literature]]
* In ''ChroniclesOfThomasCovenant'' magical PowerGlows ColourCodedElements.
* Creator/JRRTolkien's ''LordOfTheRings'': orc-hating elvish swords and entire tower of Minas Morgul.
** Gandalf invokes this trope when he adds lighting to [[HandWave explain]] the disappearance of Bilbo in his Birthday party. After Gandalf's [[spoiler:resurrection]], his increased power makes him emit illusory sunlight.
* Mocked in ''ASongOfIceAndFire'' when Stannis gets Lightbringer, a literal glowing sword, but despises it because it doesn't do anything else better than most swords.
** It is speculated that this is because it isn't the true Lightbringer, which would probably glow, but would actually be hot as well. So PowerGlows, but so does a cheap glamour. Although it's worth noting that so far none of the actually superior swords have glowed.
** Played straight with Melisandre's ruby. Whenever she causes weird magical stuff to happen, her ruby choker is said to glow intensely.
* In ''TheDresdenFiles'' Harry more than once makes his staff/blasting rod glow, usually when he is about to smash something into the water table.
** Also his much abused amulet, which glows whenever he uses it as a light/silver bullet against superpowered werewolves.
** Then we have the Swords of the Cross, all of which glow with varying intensities depending on the wielder and situation. For instance Amoracchius once shines so brightly that it chargrills many light hating hobs from 20 feet away. Similarly, when Murphy [[spoiler: draws Fidelacchius]] it glows brightly enough to scare off Deirdre.
** Any time Harry uses Soulfire or Hellfire.
** When Harry [[spoiler:starts training Molly to use her magic she]] had a tendency to glow when excited. This was fixed after the first few weeks of training
* Subverted several times in the Literature/{{Discworld}} series. Because of the world's narrative causality, mundane items wielded with true conviction are often stronger than fancy magic weapons.
** Justified in the case of Death's scythe and sword, since these are so sharp, they cut up the air molecules that happen to bump against them. This, of couse, causes lightning-like ionization.
* In JamesSwallow's TabletopGame/{{Warhammer 40000}} novel ''[[Literature/BloodAngels Deus Encarmine]]'', the Spear of Telesto. And Isskvan the Hated glows with anger.
** And then the tomb of Sanguinius in ''Red Fury''.
* All magic produces bright glows in ''{{Elantris}}'', because it is the sign of the power of [[TheForce the Dor]] breaking in to the physical world. The most powerful practitioners of magic, the [[PhysicalGod Elantrians]] actually glow non-stop, but other magic-users produce light with their powers as well.
** Interestingly the glowing caused extra problems when the [[TheMagicGoesAway magic went away]] because [[spoiler: The glow attracted a fungus which fed on and enhanced the light. When the magic failed and the glow disappeared the fungus died and rotted, coating all of the surfaces of Elantris in slime.]] This slime is partially responsible for why the city looks so much more decrepit than it should be.
* Stormlight, the primary magic power of ''Literature/TheStormlightArchive'', glows, as one might expect from the name. A slight subversion in that most people use the glow more than the power itself, though it can be used to run {{Magitek}}.
* In Creator/RobertEHoward's ConanTheBarbarian story "Literature/BeyondTheBlackRiver", the forest demon glows.
* Katherine Kurtz's {{Deryni}} can produce spheres of cool light (called Hand Fire), and they can manifest glowing auras around their bodies. Ritual circles (and dueling circles) appear as glowing light. Colours tend to be hereditary (Haldane red, Corwyn green), and certain colours (green, silver, gold) are associated with Healing ability.
* Deconstructed and PlayedForDrama in Jessica Amanda Salmonson's ''The Golden Naginata'': Unless it has been [[AppliedPhlebotinum used]] to [[UnholyHolySword wound]] the ''[[{{Unicorn}} kirin]]'' who guards it within the past month, the [[BladeOnAStick titular weapon's]] glow is so bright that it blinds anyone who sees it.
* More powerful Wizards like Septimus and Marcia in ''Literature/SeptimusHeap'' get enveloped in a purple aura when they are spellcasting.
* Invoked in ''Literature/DreamPark'', as holographic auras of appropriate intensity are overlaid on Gamers' bodies when they activate their characters' magic.
* "Literature/WildCards" has the [[SuperStrength Golden]] [[NighInvulnerable Boy]] Jack Braun, whose body is surrounded by a golden aura whenever he uses his abilities or is under attack. Surprisingly, the field activates whenever there is a threat to Jack, even if he doesn't know about it, or in mundane situations like if his razor were to slip while shaving.
* Many of the spells in {{Literature/Harry Potter}} take the form of beams of light, and many more glow.
* Played straight in ''TheElenium'' and it's sequel ''The Tamuli''. Several spells that the Knights and Sephrenia use create a light, but none are on par with Xanetia, who's ''entire body'' glows when she unleashes her power. Toyed with on the spiritual level, as Xanetia's power comes from a curse that renders her dark and undetectable, while the magic the others are blessed with shine and ring out for others to notice.
* Nicolae Carpathia in the Literature/LeftBehind book ''Armageddon'' gives off a burnt-orange glow while he and most of his Global Community cabinet are stuck in New Babylon during the Fifth Bowl Judgment that causes complete darkness throughout the whole city.
** Jesus Himself, as He is "the Light of the world".
* The seraph blades, the angels and Magnus' hands all do this in ''Literature/TheMortalInstruments''.
[[/folder]]

[[folder:Live Action TV]]
* In ''{{Smallville}}'', the usage of some meteor powers cause glowing, but [[spoiler:Chloe's [[EmpathicHealer healing powers]]]] is most notable. ''Fracture'' shows that [[LightIsGood pure white light]] is literally shone on everything in the mind world of whoever she is healing, while most meteor powers glow [[GreenRocks green]].
* In ''Series/StargateSG1'', the glowiness of a power source is directly proportional to how powerful it is. The most powerful, Project Arcturus, creates a giant glowy ball of pure energy.
** Lampshaded in a later episode where determining whether a super powerful artifact is safe to handle amounts to "Well, it's not glowing anymore, so..."
* When someone glows on ''Series/DoctorWho'', something BadAss is about to happen. Cases in point, the Bad Wolf and psychic supercharged Doctor.
* In ''MadanSenkiRyukendo'', the Ultimate form of the title hero is ridiculously shiny, and his final attack even moreso.
* In ''Series/StarTrekTheNextGeneration'', the Warp Core of the ''Enterprise'' has a band of glow running down it. The faster the Warpspeed, the faster-moving the glow. ''Franchise/StarTrek'' does this a lot to show that things have power behind them.
** That could simply be an indicator light.
** It appears that electrical machinery also has an electromagnetic aura when viewed through Geordi's VISOR, as we got to see in one episode which gave us a perspective that went -quite literally- through his eyes. This includes the android, [[RidiculouslyHumanRobot Data]]. Geordi is rather surprised to find that nobody but him can see this aura.
*** Then later Geordi [[FridgeLogic fails to realize]] that another android built by the same guy who built Data isn't a human.
**** In this case, she was built with devices that mimic human life signs. It would stand to reason that they also shield any EM field emitted by the machinery. Otherwise, any old tricorder would be able to pick up the readings.
* In ''BabylonFive'' when Delenn and the White Stars take on the Drakh, the Drakh weapons systems glow brighter and brighter to build up the tension as they prepare to fire.
* In the pilot for ''TheSarahConnorChronicles'', the crude EnergyWeapon Cameron assembles in the safe of the bank only has enough power to kill Cromartie when the "isotope" powering it begins to glow.
* In ''Toku'', a basic rule is "if you make your [[SuperSentai sword]] or [[Series/KamenRider foot]] glow, it will gain the power to explode rubber monsters."
** ''Series/KamenRiderFaiz'' had an interesting spin on it: The five Riders' costumes were covered with "veins" through which pumped a glowing substance that to powered them. In nighttime scenes, the "veins" and visors would glow, and use of a FinishingMove would cause a bead of energy to run from the belt (the main power source) to the Rider's foot or sword or whatever they were going to use to kick butt.
* When a magical ChekhovsGun is found in ''Series/BuffyTheVampireSlayer'' the following conversation is held:
--> '''Giles:''' It appears to be paranormal in origin.\\
'''Willow:''' How can you tell?\\
'''Giles:''' Well, it's so shiny.
* The ''Series/WonderWoman'' TV series: There is always one of those just when [[SecretIdentity Diana Prince]] [[EverythingsBetterWithSpinning spins]] [[ChangingClothesIsAFreeAction to change clothes into]] WonderWoman. (Notice that there wasn't any AudibleGleam nor PowerGlows in "The Feminum Mystique Part 1", the only episode in the series where Wonder Woman changes back into Diana Prince.
* In ''Series/{{Supernatural}}'', the [[Characters/SupernaturalDjinn djinn's]] hands or eyes glow blue when they use their powers.
[[/folder]]

[[folder:Mythology & Religion]]
* After returning from Mt. Sinai after his first meeting with God, Moses was said to be glowing with beams of light emiting from his head. A mistranslation from Greek to Latin caused Donatello to sculpt him with horns.
[[/folder]]

[[folder:Pinball]]
* During the buildup to the [[WizardMode "Final Adventure"]] in ''Pinball/IndianaJonesStern'', the Ark of the Covenant starts to glow red.
* In ''Pinball/DungeonsAndDragons,'' the Wizard's hands and the party's weapons are shown glowing with power.
* The mercurial sphere in ''Pinball/SilverballMania'' glows as newly-formed people rise from its surface.
[[/folder]]

[[folder:Tabletop Games]]
* In ''DungeonsAndDragons'' third edition, magic weapons have a 30% chance of glowing with light equivalent to that of a torch.
** In fourth edition, if you don't want to have a bunch of (potentially handy) secondary effects, you can get a Fire, Ice, Poison, etc. enchantment. Activating the enchantment [[ExactlyWhatItSaysOnTheTin changes your next attack into the specific element type]], nothing more. Except the Sunblade enchantment, which gives radiant damage and illuminates a large area around the sword itself. Great for slaying undead and certain types of abominations; NOT so great for doing so stealthily. Oddly enough, there's only a total of about five or six weapon enchantments that will ''mechanically'' give off light, although flavor text varies wildly.
* ''{{Exalted}}'' puts this principle to good use: the more Essence you draw into your Charms over a scene (i.e. the more powerful you make your superpowered attacks), the more glow, or Anima (in the parlance of the game), you produce. It begins with your Caste mark faintly appearing on your forehead, progresses into a glowing field or effect which physically envelopes you in various ways[[note]](brilliant golden glows for Solars, sickly green lights for Infernals, silver tattoos lighting up across Lunars' skin, elemental environmental effects for Dragon-Blooded, spiritual auras and halos for Sidereals, bleeding necrotic Essence for Abyssals, and industrial or technoscientific effects such as electric discharges and arcs, billowing steam, and even chemical or molten metal secretions from Alchemicals' skins)[[/note]], and culminates in your [[BattleAura Anima Banner]] unfurling in some spectacular fashion. Once those Charms get about 16+ Essence pumped through them during a fight, a couple of battling Exalted can be seen unmistakably for miles around, and can even approximate daylight visibility conditions during the night.
** Which might seem like a horrible disadvantage to the cause of stealth, except that an Exalted with 16+ Essence running through their Charms is more or less a PersonOfMassDestruction at any rate, and not to be fucked with.
[[/folder]]

[[folder:Video Games]]
* In ''VideoGame/SuperSmashBros Brawl'', characters will obtain a [[BattleAura glowing aura]], along with [[GlowingEyesOfDoom yellow eyes]] when they break a Smash Ball, an item that gives them the capacity to perform a personalized FinishingMove.
** Lucario has a constant purple glow around his hands, representing his Aura powers. And he glows more as he takes damage, representing increased power.
* In ''Franchise/{{Ultima}} 6 and 7'', every single magical item glows brightly, using palette cycling. This is spoofed in various fanfics.
* In ''VideoGame/NeverwinterNights'' magical weapons are also good light sources.
** In [[VideoGame/NeverwinterNights2 the sequel]], magic weapons have various glows depending on the enchantment. ''Holy'' glows, ''fire'' is flame-wreathed, and ''thundering'' has little puffs of ... ''something''.
** Ammon Jerro's PowerTattoo glows.
** In ''Storm of Zehir'', +1, +2 and so forth weapons glow in a way that looks like the devs [[WildMassGuessing wanted to simulate light glinting off a shiny surface]], but [[SpecialEffectsFailure couldn't make the graphics engine do the job]].
* The player of ''VideoGame/DeusEx'' gets a glowing nano sword. It is otherwise perfect for sneaky silent kills, but the bright glow tends to draw attention.
* In ''VideoGame/WorldOfWarcraft,'' enchanters can put a glow on any weapon. Typically, the more powerful enchants glow brighter, and the type of enchantment determines the color of the glow.
** In the ''Burning Crusade'' expansion to [=WoW=], Blizzard one-upped themselves by enabling enchanters to apply a glow to weapons that's actually a complex graphical animation. The Mongoose enchant causes your entire weapon to crackle with lighting, while the Savagery enchant makes your weapon drip blood.
*** While the primary theme of The Burning Crusade was "[=WoW=] [[foldercontrol]]

[[folder: In Space ]]
!!!", the secondary theme was "glowing stuff is really awesome". Seriously. Just look at most of the new areas - they're glow-tastic. Also, both of the new races have [[GlowingEyesOfDoom glowing eyes]].
*** The multi-colored glowy-LiteBrite-Crystal cave in the original Un'Goro Crater was simply power-glow-tastic.
*** ''Wrath of the Lich King'' too, the whole nexus which is Malygos' lair is really one hell of a glow-tastic SceneryPorn.
*** In ''Cataclysm'', Blizzard one-ups themselves again with the Power Torrent enchant, which shifts through the colors of the rainbow periodically ''and'' is the best-in-slot enchant for all raiding casters.
* In ''VideoGame/DragonQuestVIII'', Once a character reaches maximum tension, that character will glow until they attack or use magic that has a quantifiable effect, be it damage, healing or a stat buff. They'll also stop glowing if a boss nullifies their tension with a [[StatusBuffDispel wave of ice]].
* In ''FinalFantasy'', any place with a constant glow to it (such as the Mako Reactors in ''VII'' and Bahamut's hideout in ''VIII'') is very important place with lots of either magical or technological power hidden from mortals. Party members tend to glow when using special abilities, and {{LimitBreak}}s always glow brightly.
** An interesting example is in ''FinalFantasyVI'', where Kefka is surrounded by a pyramid of magic before the final fight. In addition to showing his immense magical powers, it reflects his emotions: when he's taunting the party and laughing, it's blue, then turns purple as he laments the futility of life, green when the party members declare he's wrong, then red when he gets angry. Emotion Glows too.
* ''DissidiaFinalFantasy'', pretty much every character gets an aura of some sort when they enter EX Mode.
* ''CityOfHeroes'' (And [[CityOfVillains Villains]]) doesn't shy from this, either. By hitting Level 30, characters gain the ability to attach an Aura of his choice to every costume. Most of these simply Glow (although some get creative and ''crumble'' instead), and none of them does anything other than ''being awesome''.
** Even without the lvl 30 auras, most melee characters have a set of glowy auras from a variety of defensive powers (and even being able to run fast causes your feet to glow)
* In ''VideoGame/{{Fable}}'', your tattoos and hands glow with high enough magic levels.
* In ''VideoGame/TalesOfSymphonia'', when characters go into [[SuperMode Over Limit]], they get a black aura around them.
* Likewise in ''VideoGame/TalesOfVesperia'', characters gain an aura when entering Over Limit.
* In the first ''VideoGame/MegaManBattleNetwork'' game, Mega Man glows when [[spoiler:his program is being rewritten after Hub.bat is installed.]]
** The ''Anime/MegaManNTWarrior'' anime also does this with [[WaveMotionGun Program Advances]]. Especially the first few times they're used.
** Later games in the series implement [[{{Synchronization}} Full Synchro]] as an effect you can get in battle if you're skilled. It's depicted by Rock glowing (his color becomes light) and a pink halo spinning about his body. Very powerful [=NPCs=] and enemies in cutscenes also flash with light, notably Gospel in the second game, Proto (Alpha) in the third game and the Cyber Beasts in the sixth.
** Every version of Mega Man who can charge up usually glows while doing so. ''VideoGame/MegaManX'' was the first to glow different colors depending on how much he's charged. With the double-shot and Zero's Z-Saber in ''X3'', he glows blue, yellow, pink, and finally green to indicate he can fire two fully-charged shots and the Z-Saber. Zero glows these same colors when he charges up his Z-Buster, but ''X3'' is the last game where Zero can use his Buster the same way, and X one-ups him for once by launching an energy wave when he swings the Z-Saber, assuming he has the double-shot.
* Early ''VideoGame/MegaMan'' games had Mega Man get PowerGlows when charging the Mega Buster. Because of the way NES graphics worked, the powerups scattered around levels would exhibit the same pattern in time with his. Later games added SuckingInLines.
** [[VideoGame/MegaManZero Omega Zero]] has a white aura around him, so you know he's not to be taken lightly.
** This was carried over from Virus Infected Zero in ''X5'', who was surrounded by a ominous purple aura.
* ''VideoGame/TheElderScrollsIIIMorrowind'' tried and failed to utilize this. The glowing magical items came off [[{{Narm}} looking like they were]] [[SpecialEffectsFailure covered in plastic-wrap.]]
** ''[[VideoGame/TheElderScrollsIVOblivion Oblivion]]'' manages to pull this off much better, with enchanted items having a slight subtle glow instead the plastic-wrap one. [[GameMod Mods]] exist for both games that remove the effects if you don't like them.
** ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]'' mixes the two: enchanted weapons have faintly glowing swirls and whorls like ''Morrowind'' (only ''way'' better-textured), while armor and jewelry uses the ''Oblivion'' glowy outline.
** The ''Dragonborn'' expansion for ''Skyrim'' introduces the [[SuperMode Dragon Aspect]] Shout, which surrounds the user with a set of glowing, draconic armor.
* Entering Ripper Mode in ''VideoGame/MetalGearRisingRevengeance'' causes Raiden to glow blood-red.
* The old Magic Knight game ''Spellbound'' for the ZX Spectrum featured the spell Armouris Photonicus, which if cast in the right place would make your armour glow sufficiently to traverse two darkened rooms safely, making this OlderThanTheNes.
* ''VideoGame/{{Zork}}'': "Your sword is blowing glue! Wait, let me try that again."
* ''VideoGame/DragonBallZBudokaiTenkaichi 2'': low-ranking characters might glow faintly when summoning ki; high-ranking characters glow with intense brightness at all times, and even the simplest moves look like a fireworks display crashing into a laser light show.
* Any ''SonicTheHedgehog'' character with a [[SuperMode super form]] when in said form.
* ''KingdomHearts''. And Kingdom Hearts II is even worse. Everything sparkles, lights, shines, flares, and so on... MY EYES!!
* ''VideoGame/CustomRobo'': Soulboost causes this, although the best the graphics engine could do with it is turn the robo's model gold.
* ''Franchise/MassEffect'''s biotics have glowing energy about them when they use their [[MindOverMatter biotic powers]], especially when using a powerful biotic move. Samara is a really good example, especially when she fights [[spoiler:her daughter Morinth]] to the death.
** [[MinovskyParticle Element Zero]], though rarely seen directly, apparently has quite an energetic glow about it. This makes [[FridgeBrilliance perfect sense]] when you consider that it actually constitutes [[GeniusBonus exotic matter]] under certain conditions.
* The Soar Star in ''VideoGame/SuperMarioGalaxy'' gives Mario a white glow around his hands, along with a pair of red trails as he flies along.
* ''VideoGame/ChronoTrigger'': Marle can ''heal'' people with her glow.
* In Richard Bartle's original MUD, swords ''inherently'' glow. If you use your wizardly powers to create a wooden sword that falls apart after one hit, it'll still glow purely by virtue of being a sword.
* The eponymous race of ''VideoGame/ValkyriaChronicles'' are said to [[spoiler:and do]] glow with an otherworldly blue flame, as well as RedEyesTakeWarning, when using their powers.
* Many {{MMORPG}}s have weapons that glow when they're enhanced. So what does a newbie typically ask of the wielder of such a weapon?
** "What kind of weapon is that?" Nope.
** "Where did you get that?" Not even close.
** "How do you make your weapon glow?" Bingo!
** FlyFF took this UpToEleven-- every piece of equipment could be upgraded... and L10 Enhancements created awesome blue glows. If you had Level 120 Equipment with L10 Enhancements in every slot, [[PowerGivesYouWings you got glowing blue wings]] as well as a pulsing blue BattleAura. That said, you had to be very rich to obtain that gear.
** Inverted in PhantasyStarOnline. The common, weak weapons are all photon based, as opposed to some rare, high end weapons, which are non glowing real guns and swords. presumably because photon based weapons are cheaper to make than a properly tempered steel katana or a finely machined kinetic firearm.
* In ''VideoGame/BlazBlue'', Ragna, Hakumen and Bang glow when their {{Super Mode}}s are active. For the first two, having the SuperMode permanently switched on is part of their [[SNKBoss Unlimited]] package.
** Rachel is surrounded by an ominous purple glow when in her [[SNKBoss Unlimited]] mode.
* In ''MetroidPrime'', anything even vaguely related to phazon is always glowing. In the rest of the series, all powerups glow.
* In ''VideoGame/TeamFortress2'', critical projectiles glow your team's color, as do weapons when under an effect that will give them crits. In addition, an Ubercharge makes you glow your team's color while giving you invincibility for ten seconds.
** While not exactly a glow, the "unusual" hats give off a special aura when worn.
* In the ''VideoGame/{{Fallout}}'' series there is a type of ghoul called Glowing Ones. As their name suggests, they are brightly [[ExactlyWhatItSaysOnTheTin glowing ghouls]]. They are a stronger type of the regular ghoul with special powers directly related to their heavy irradiation, including a burst attack where the entire area around them briefly becomes irradiated, too.
* ''VideoGame/DynastyWarriors: Strikeforce''. ''All'' characters glow when they enter their SuperMode.
* A rule of thumb in ''{{Rift}}''. Any monsters nearby when one of the titular [[HellGate rifts]] opens will become "touched" by that rift's element. [[CastingAShadow Shadetouched]] monsters glow purple, [[GreenThumb fae]][[LightEmUp touched]] monsters glow pale green, [[BlowYouAway windtouched]] ones glow deep blue, [[DishingOutDirt stonetouched]] ones glow tan, [[MakingASplash tidetouched]] ones glow teal, and [[PlayingWithFire flametouched]] ones glow red. And they all get a buff to their damage and a [[ElementalRockPaperScissors weakness]] to their opposite element.
* Irenicus in ''BaldursGate 2'' is an obscenely powerful mage, and glows faintly at all times. Also, a lot of enhancing spells cause their recipients to light up like Christmas trees.
* In {{Minecraft}}, enchanted tools and armor glow purple. While not necessarily more ''powerful'', enchanted items all have some sort of beneficial affect.
* Most ''FireEmblem'' games from ''[[FireEmblemAkaneia Mystery of the Emblem]]'' onward are strong proponents of this - whenever a unit attacks with an InfinityPlusOneSword, the weapon will give off a bright split-second AudibleGleam which covers the entire screen. The exception is [[VideoGame/FireEmblemTellius the Tellius duology]], which for whatever reason doesn't do this.
* All enchanted weapons in DarkMessiah glow in their enchantment's [[ColorCodedWizardry respective color]]. Escpecially lightning-enchanted weapons glow so bright that in dim lighting conditions it becomes hard for the player to see anything else (such as enemies, for example...).
* In the online game ''Bearbarians'', warriors who begin to rack up a combo damage bonus begin to glow, unless you've turned off particles.
* ''VideoGame/PlaystationAllStarsBattleRoyale'' uses this effect to distinguish "All-Star Power" (AP) both in-game and in-story, where the winner in each character ending can be seen glowing with Blue (having defeated Polygon Man, the apparent source of AP). Characters will glow slightly when able to use a Level 1 Super, become brighter at Level 2 and be almost completely illuminated when using their Level 3.
* ''VideoGame/JoeDeversLoneWolf'': Lone Wolf's eyes glow when he uses a Kai power or the Summerswerd. The Summerswerd itself glows when in use. As do regular weapons empowered by Lone Wolf's Weapon Mastery discipline.
[[/folder]]

[[folder:Webcomics]]
* {{MAG ISA}} -- [[http://mag-isa.thecomicseries.com/comics/pl/119792 Kyle]] glows after he Hulks out.
* ''{{Darkbolt}}'': Everyone who is powered by demons or angels...
* As ''QuestionableContent'' reveals, even [[http://www.questionablecontent.net/view.php?comic=717 bourbon whisky will glow]] if [[http://www.questionablecontent.net/view.php?comic=718 it's good enough]].
* In ''Webcomic/SequentialArt'', Art asks, "Why is it that big, ominous tomes always glow so bright?!" [[http://www.collectedcurios.com/sequentialart.php?s=298 Good question.]]
** Because they're ''illuminated texts!'' [[JustForPun Ha!]]
* ''Webcomic/GunnerkriggCourt'': One of Eglamore's {{BFS}}es glows; presumably this makes it more effective against Shadow men. Also, antigravity glows [[TechnicolorScience purple]].
* Using cosmic powers seems to produce a purple glow in ''[[Webcomic/M9Girls M9 Girls!]]''
* As demonstrated [[http://www.rhjunior.com/NT/00474.html here]] in ''[[http://www.rhjunior.com/NT/ Nip & Tuck]]'', particularly sexy lingerie glows, too. (Obviously a reference to the ''Film/PulpFiction'' example mentioned above.)
* In ''Webcomic/SluggyFreelance'' Gwynn tends to glow and [[PowerFloats float]] when she starts really channeling her witchy powers.
** Also happens to Horribus when he's getting ready for his grudge match with Torg. And, of course, Torg's sword glowing is the sign that it's awakened its sentient, kill-anything-in-one-strike mode.
* ''Webcomic/TheOrderOfTheStick'' takes this to its logical conclusion; if one high-level spellcaster's power glows, then the combined effects of ''[[http://www.giantitp.com/comics/oots0634.html four]]'' of them glow even more.
* In ''Webcomic/ElGoonishShive'', magic and Ki users can glow to indicate that they are using their powers. For Nanase's Fairy doll spell, this has practical uses. For martial arts, it's RuleOfCool.
* The river [[Webcomic/GirlGenius Dyne]] glows blue, of course this might be because it is Radioactive.
* Magical things in ''TheWayOfTheMetagamer''. Particularly the [[{{BFG}} Rob of Za-Boom]].
* Magic items glow in ''{{Goblins}}'' when being used. Some of them also "smoke" light.
** Actually they channel the users aura, which changes color and effect (i.e., "smoking" light) depending on the individual. This is why when someone loots a magic weapon, it glows differently than whoever was just using it.
* TheDreamlandChronicles: [[http://www.thedreamlandchronicles.com/the-dreamland-chronicles/chapter-08/page-508/ Why Felicity chose to steal the amulet]].
* In {{Harkovast}}, magic is generally represented as glowing. This is most evident on the [[http://www.harkovast.com/index.php?id=22 Darsai]] energy weapons.
* BobAndGeorge
** [[http://www.bobandgeorge.com/archives/001229c The portal is very bright and portal-looking.]]
** [[http://www.bobandgeorge.com/archives/031213c Warning Dr. Wiley that he's about to lose his fortress. Again.]]
* A few of the more powerful player characters in ''Webcomic/{{Homestuck}}'' do this. Aradia and Sollux both glow when using their [[MindOverMatter telekinetic abilities]] (white and red/blue, respectively). Rose, on the other hand, glows ''[[DarkIsEdgy black]]'' when tapping into TheDarkArts.
** [[OurVampiresAreDifferent Rainbow Drinkers]] have glowing skin.
** John glows bright blue when using his Heir of Breath awesomeness, known in-universe as The Windy Thing.
* In Webcomic/TheRifters, Tobi's gained some kind of ability that activates when he clenches. He glows when he clenches!
* {{Strays}} [[http://www.straysonline.com/comic/76.htm Feral's blade]]
* Webcomic/{{Memoria}} [[http://memoria.valice.net/?p=243 His hand]]
* WoodenRose [[http://www.woodenrosecomic.com/comic/comic.html Reviving a woman from the bed where she just had a C-section]].
* In {{Roza}}, [[ThePowerOfBlood her blood is magical]]. [[http://www.junglestudio.com/roza/?date=2007-05-03 It glows.]]
* [[http://whatsshakincomic.com/2011/01/17/page-20/ Ell]] from WhatsShakin has a power up moment with a golden glow.
* In ''ImpureBlood'', even the MundaneUtility of unlocking the door [[http://www.impurebloodwebcomic.com/Pages/Chapter003/ib017.html glows]].
* In ''{{Endstone}}'', the ArtifactOfDoom, [[http://endstone.net/2011/06/23/6-04/ the Banestone]], can really glow.
* Graham's 'mark' in ''Webcomic/WizardSchool'' is an ordinary tattoo placed while our 'hero' was in a drunken haze - which [[http://www.meetmyminion.com/?p=1141 glows because the Big Bad infused it with magic.]]
* In ''{{Sinfest}}'', [[http://www.sinfest.net/archive_page.php?comicID=3162 zapping the devil book to subdue it glows]].
* Parodied in ''Webcomic/{{xkcd}}'', where [[http://xkcd.com/1114/ a sword glows because it's radioactive, and will give you cancer.]]
* In ''Webcomic/RustyAndCo'', [[http://rustyandco.com/comic/level-6-49/ The Python of Merrssshaulk” glows on its own.]]
[[/folder]]

[[folder:Web Original]]
* In ''Roleplay/TheGamersAlliance'', all gods glow when they manifest in their corporeal form.
* WhateleyUniverse example: [[PersonOfMassDestruction Tennyo's]] sword glows a brilliant blue, and can cut through pretty much ''anything'' since it's made of some sort of anti-matter. Tennyo herself does the glowy bit when she gets really amped up, complete with RedEyesTakeWarning. Several Energizers like Golden Girl also do the full-body glow when they kick in their powers.
* UnlikelyEden example: [[BadassAdorable Heather's]] axe starts of as just strangely blurry, but later, as her Preferred Weapon Effect kicks in it attains full glow. Additionally, the eyes of all [[SuperSoldiers Coalition soldiers]] and [[SuperSoldiers Ourkind]] bioluminesce when their abilities are activated.
* In ''Literature/{{Spectral Shadows}}'' we have Christine with her healing powers and her fur glows yellow when in use.
* In ''Literature/{{Phaeton}}'' this happens when Trayen energises, Teliha levitates and when Sam shapeshifts, there are probably other powers that do this too but it just hasn't been mentioned yet.
[[/folder]]

[[folder:Western Animation]]
* In ''WesternAnimation/AvatarTheLastAirbender'', Aang's eyes, mouth and [[MarkedChange tattoos]] do this when he activates the [[UnstoppableRage Avatar State]], as do that of all his past lives.
* In ''WesternAnimation/BeastWars'', Sparks glow, which makes sense because they are powerful. So do many of the things belonging to the aliens.
* In some of the ''{{Bionicle}}'' movies, the characters' [[MaskOfPower masks]] glow while being used.
* In the earlier episodes of ''WesternAnimation/KimPossible'', Shego had clawed gloves that glowed with a green light when she fought; the glow was implied to amplify the force of her attacks. In the second season, she began displaying the ability to use the glow as a projectile attack, throwing blasts of energy, and it was retconned into a superpower called the "Go Team Glow", which she and her brothers obtained as children when they were exposed to an alien meteorite.
** A fair amount of the {{Doomsday Device}}s and {{McGuffin}}s in the show glow too.
** Ron's Monkey Power
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** The show applies this to, well, magic, which arguably qualifies as this trope. In the premieres of both the first and second seasons, for example, Twilight's eyes (and the second time, those of her friends too) glow when she and her friends unleash their CareBearStare.
** Also happens in her exam flashback in "The Cutiemark Chronicles" when the Sonic Rainboom triggers her innate magic and makes it go out of control. Complete with PowerFloats and a few (thankfully temporary) cases of BalefulPolymorph of bystanders.
** During Twilight's [[spoiler: transformation into an alicorn]] she gets surrounded by a bright purple light in the shape of her cutie-mark. Earlier in the episode, that very same power glows makes it look as if it burned Twilight into a pile of ash, much to her friends' terror.
** In ''[[Recap/MyLittlePonyFriendshipIsMagicS4E26TwilightsKingdomPart2 Twilight's Kingdom Part 2]]'':\\\
Twilight sparks with electricity occasionally as a result of being supercharged by the Princesses.\\\
When Twilight first receives the combined power, as well as when she tries to lower the moon and raise the sun, her body glows and her hair turns more ethereal, with a glow about her.\\\
The Rainbow Power is very glowy indeed, which wears off once it's done its job.
* ''{{Sealab 2021}}'': "You see this, you see how my body's glowing like that? Yeah, a lot of people can't do that."
* In ''TheSecretSaturdays'', the human members of the titular Saturday family each have a weapon with some sort of glow, and then Zak's eyes glow when he uses his powers.
* In ''TransformersAnimated'', the [=AllSpark=] glows. So do all its pieces, and Sari's key when it's near them.
* In ''TransformersCybertron'', when using great amounts of power a character will glow. Used most dramatically in the FinalBattle of Optimus Prime and Galvatron.
* The titular sword of ''{{Xcalibur}}'' does this.
* [[PhysicalGod Apocalypse]] in his ''XMenEvolution'' incarnation does this. It makes him seem invincible.
* In ''WesternAnimation/YoungJustice'', Aqualad has [[PowerTattoo eel tattoos]] on his arms that glow light blue when he's using his [[MakingaSplash hydrokinesis]] powers.
* In ''TheAvengersEarthsMightiestHeroes'', Ms Marvel glows yellow when she is using her energy absorption powers. Combined with PowerFloats, this is also the first indication that she has gained superpowers.
[[/folder]]

[[folder:Real Life]]
* Light is a form of energy, and flow of energy is power. Light cannot be created from nothing, so power is required to make anything glow, even a tiny LED.
* Incandescence is what causes really hot things things to glow, and hotter things to glow more. It is the underpinning of this trope, and it's cultural ubiquity comes from the two most primal sources of glowing power: the sun and fire. Both glow with incandescence. Light bulbs, lava and molten metal get an honorable mention.
** Lightning glows by a slightly different way, wherein the electricity ionizes the air. But like incandescence, the light is emitted by an electron dropping back to a stable position.
** Averted when electricity travels through a wire. Invoked by this [[http://gizmodo.com/5880893/resistance-is-futile-you-will-buy-this-animated-light-iphoneipad-charger-too USB cable]], which "visibly shows the electrical current" (if you're in a dark room that is).
* Unlike the ones in TV, real nuclear reactors glow [[http://en.wikipedia.org/wiki/Cherenkov_radiation blue]]. Pretty, but for the record, if you see Cherenkov radiation in air, you have basically several minutes left to live.
** If what's separating you from the core is not air but water, you're probably fine at only a few meters away. Pool-type research reactors (used for irradiating stuff for various reasons, not for generating power) are basically deep swimming pools with the core at the bottom, and it's often possible to look directly at the core (through ten meters or so of water) and actually see the Cerenkov radiation.
** The second [[http://en.wikipedia.org/wiki/Demon_core "demon core"]] accident produced such a blue flash.
* The popular idea of green radioactivity dates back to radium paint, which was used for clock dials and glow-in-the-dark signs in 1920s. Later when the hazardous effects of radiation were discovered, the green glow got its new meaning. Oxidising white phosphorus, also quite nasty material, glows green too.
** It's worth making a distinction here: radium does not normally glow. Mix it with a phosphorescent or fluorescent material, though ... the particular one used for watch dials ''etc.'' glowed green, and so in the popular imagination, ''all'' radioactive materials glow green.
** Tritium, a hydrogen isotope, has replaced radium in all applications of RealLife PowerGlow. It is still radioactive, but emits relatively harmless beta particles, turning into helium-3.
*** The tritium isn't glowing in itself - so you put it into a glass vial covered with phosphorus, and it's the ''phosphorus'' that's glowing because it's reacting to the beta radiation. Depending on the chemical composition of the phosphor (not the element, but a term meaning ''substance that glows when energetically excited''), you can get different colors. It's a self-powered fluorescent light.
** Another is that the presence of uranium or uranium compounds during the production process can turn glass and diamonds yellow-green or green (with higher uranium concentrations making the color more brilliant green), which then glow under a black light.
** [[http://msnwllc.com/ MSNW]], a company building a fusion rocket engine, has some photos on their webpage of some things that are ostensibly fusion or plasma related glowing nicely.
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