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Weakened by the Light

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Light is a powerful thing. Some enemies, especially living shadows and vampires, are weakened by it, if not outright destroyed. The reason is simple: Light Is Good + Good Hurts Evil + Dark Is Evil = Light Hurts Evil.

Sunlight seems to be particularly potent, which gives Cue the Sun a whole new meaning for such nocturnal nasties. Works fond of Doing In the Wizard often explain this as an aversion to ultraviolet light.

The psychology behind this trope is that humans are very reliant on sight, so we feel extremely vulnerable in the dark. See Dark Is Evil for the general association of evil things with darkness.

If the author is not careful, this can overlap with Weaksauce Weakness, or at least Kryptonite Is Everywhere. May be counteracted with a Kryptonite-Proof Suit. This might be one of the reasons it's Grim Up North — the longer nights give sunlight-averse creatures more time to hunt.


Sub-Trope of Supernatural Repellent. See also Holy Burns Evil and Suicide by Sunlight. Contrast Cross-Melting Aura. Often mixed with Light 'em Up. Not to be confused with Blinded by the Light, a much less severe and more mundane form of weaponizing light, and Day Hurts Dark-Adjusted Eyes, a natural reaction to daylight that carries no moral connotations.

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    Anime & Manga 
  • Bleach: Espada #9 Aaroniero Arruruerie cannot stand sunlight and can't maintain or perform his shape-shifting in the light.
  • Demon Slayer: Kimetsu no Yaiba: The demons cannot withstand sunlight and will be destroyed if exposed to it. This is also why Nichirin Blades are the only weapons capable of slaying them: demons possess a powerful Healing Factor, but because the ore of Nichirin Blades have absorbed large amounts of sunlight, decapitation with a Nichirin Blade will instantly, and without fail, kill a demon.
  • Fullmetal Alchemist: A variation with Pride, the shadow homunculus, who isn't generally hurt by light; in fact, he is unable to use his powers without a light source. However, if the light becomes too bright (for example, the light from a flash bomb) his shadows will disintegrate. Ironically enough, he is also incapable of using his powers in total darkness and is thus completely helpless without a light source. This weakness is exploited on two occasions, though neither incident is successful for very long.
  • Used in Gintama against Housen, The Night King. The Yato in general are weakened by light — it's why they all carry umbrellas — but Housen spent years out of the sunlight. When exposed to it for the first time in ages, it kills him fairly quickly.
  • JoJo's Bizarre Adventure:
    • Phantom Blood: Despite being extremely powerful and lacking other vampire weaknesses, these vampires are some of the most sunlight-vulnerable vampires in all of fiction. No sizzling, no writhing in pain, not even any catching fire, they just explode the second sunlight (and Hamon, which emulates sunlight) touches them. The inference seems to be that vampirism fills one to the brim with vital energy, to the point that excess energy is like inflating an overinflated balloon.
    • Battle Tendency: The Pillar Men, progenitors of the vampires also suffered this, but only to the degree of being petrified while bathed in sunlight (or UV lamps), and reverting afterwards. Hamon can kill them but it requires that you transfer the Ripple energy into them, be it with rope or oiled up weapons, which is much easier said than done. When Kars uses the Stone Mask to turn into the Ultimate Being, he becomes not only invincible to the sun but also able to use the Ripple with absurd power.
    • Golden Wind: Polpo's Black Sabbath is also like this, on account of actually being a shadow. Lots of light ceases inability for shadows to exist, so taking full sunlight causes it to disvaporate.
  • Is This a Zombie?: Ayumu, being a zombie, can't go out in the sunlight or his body will desiccate. This weakness is negated while he's wearing Haruna's Magical Girl outfit.
  • Interviews with Monster Girls: Downplayed. Vampires in that universe do have a low tolerance to light and heat, but that's at worst uncomfortable.
  • Monster Rancher: When Moo used the Final Gate to remerge with his original body, because the process wasn't done properly (i.e. not using a magic stone), his body was vulnerable to any form of light. During a fight with the Searchers, the sun rose and burned him, forcing him to retreat. He was then confined to life support until the process was completed properly.
  • My Monster Secret: Downplayed almost to aversion with Youko. She is a vampire, and thus the sun burns her...but that only means that she gets sunburned very easily. Sunscreen is all it takes to fix that.
  • Negima! Magister Negi Magi: Pointedly averted with Evangeline, who is not harmed by sunlight. It does, however, make her somewhat sleepy, so she's often seen with a parasol anyway. One of her many nicknames is "The High Daylight Walker", emphasizing this trait.
  • One Piece: The Shadow-Shadow Fruit allows its user to steal and manipulate people's shadows; any victim of this will disintegrate in sunlight.
  • Ouran High School Host Club had several episodes of this with Nekozawa.
  • Pokémon: In "Ghost of Maiden's Peak", Gastly seems unstoppable, but when the sun rises, he says he can't stand the sunlight and retreats.
  • Saint Seiya: The Lost Canvas: Hades is severely damaged by sunlight as long as it's enough to overpower his defenses.
  • Shiki: Vampires who meet the sunlight directly catch on fire and burn to death. However, there's also Tatsumi (and later Natsuno too) who subvert this, due to belonging to a rare species of vampires who can survive under the sunlight. However, in everything else, they're exactly like the others.
  • Time Stop Brave: All creatures of the Forces of Darkness are nigh-invulnerable in the dark and can only be harmed by holy magic or holy weapons or by healing spells. When in the light, they can be harmed by anything.
  • Ushio and Tora: The (fan-suggested) Youkai Mountain Fish (Yamagyou) is an unstoppable underground-dwelling behemoth with a taste for human flesh, but has a crippling weakness: exposure to sunlight, even minimal, will cause a strange chain reaction in his body that makes him explode. Oddly enough, the Mountain Fish itself seemingly doesn't fear nor tries to avoid sunlight.
  • Vampire Hunter D:
    • Sunlight isn't immediately fatal to vampires. Rather, exposure to more than a few seconds of direct sunlight causes them to catch fire, burning painfully so long as they are exposed. Heroic Willpower is invoked if a vampire stays in sunlight to do something important, as is a vampiric Healing Factor if they make it back to shade. However, only the High Nobility are capable of even trying this. Most vampires are entirely comatose during the day, even if they remain underground.
    • In the 1985 film Count Magnus Lee sends Rei Ginsei a candle. Its light paralyzes any being with vampire blood in its veins. Greco Roman steals it and uses it against the Count's daughter Lamika. Rei Ginsei gets it back and uses it against D (successfully) and Count Magnus Lee (not so successfully).
    • In addition, dhampyrs (half-vampires) suffer from a condition called Sunlight Syndrome approximately every 6 months. During this time, they suffer from sudden exhaustion, fever, and weariness and are forced to retire for several days in order to recover. In D's case, thanks to his extraordinary physiology, he experiences Sunlight Syndrome less often, every 5 years instead. The treatment for Sunlight Syndrome is for the dhampyr to rest buried beneath the ground with just their head sticking out.
  • Van Von Hunter parodies this twice in the same arc. First, a vampire proclaims its invincibility since the moon is up—and doesn't burn until after it's reminded that moonlight is reflected sunlight. Then, the title character tries to distract another vampire until sunrise, and takes so long doing so that the sun sets again.
  • Yaiba: The Batman Hakki is scorched by the sunlight and screams in pain when exposed to it. Oddly, he's fine while wearing sunglasses.

    Asian Animation 
  • BoBoiBoy Movie 2 features the nocturnal sloth-like aliens called Kang Kong. They are very slow during the day, but viciously swift at night. Gopal slows one down with a flashlight while BoBoiBoy Blaze's fireball reveals many Kang Kongs slowly approaching them.
  • Happy Heroes inverts the trope. In Season 4 episode 45, while fighting the shadows that have been brought to life by Big M., Sweet S. accidentally discovers that they dissolve once they're exposed to total darkness. She then gives Smart S. instructions to destroy a nearby electricity source to darken the city and defeat the remaining shadows.

    Comic Books 
  • The Darkness is Made of Evil with all kinds of darkness-based powers, and it can't stand to be in bright light, making it a Logical Weakness for the beast. The setting also features the Angelus, a creature of pure light, the Arch-Enemy of the Darkness.
  • The DCU:
    • When the character Obsidian is in shadow form, light can cause him great pain and even unconsciousness.
    • According to the cover of Detective Comics #284, Batman was once changed into a "Negative Man" who was weakened and destroyed by light.
    • Batman himself employed this tactic to defeat Azrael and reclaim the mantle at the end of the Knightfall trilogy.
    • Night Girl was a member of the Legion of Substitute Heroes, and, in some continuities, later a member of the Legion of Super-Heroes. Her gimmick was that she had Super Strength, but only in the dark. Turn on a lamp, and she's normal.
    • The "Octopus Plants" which attacked Wonder Woman, the Holliday Girls and Steve Trevor in an issue of Sensation Comics wither and die in sunlight.
  • MonsterVerse: In the Kingdom Kong graphic novel, it's stated that Camazotz can't stand sunlight, so he needs to create The Night That Never Ends on Skull Island before he can emerge to claim his new kingdom. He was likewise only out at night when he was under Ghidorah's command during the global Titan-rampage.
  • Downplayed with Morbius the Living Vampire. Since he's not a real vampire, sunlight will not reduce him to dust. But he does have to avoid the sun due to his extremely pale skin, or he'll quickly suffer burns which could lead to melanoma, and is at risk of retina damage.
  • In the New 52, Superman's Crime Syndicate counterpart Ultraman is weakened by sunlight; as shown in Forever Evil (2013). To counter this, he creates a solar eclipse so he can go about during the day.
  • Preacher: Cassidy the vampire outright catches fire when exposed to sunlight. He kills another vampire by nailing him to a roof and waiting for dawn, and later commits temporary suicide by waiting for daybreak.
  • X-Men: Supporting character Greymalkin has Super Strength when he is in darkness.

    Fairy Tales 

    Fan Works 
  • Abraxas (Hrodvitnon): The Timeline states that here, unlike in the MonsterVerse canon, the Titan Camazotz's aversion to sunlight is put on display when Monster X causes sunlight to break through his storm on Skull Island.
  • The monsters under Calvin's bed in Calvin and Hobbes: The Series vanish with light. Except for Jark, because he's partly absorbed Calvin's DNA. It doesn't last, though.
  • In Hope Comes to Brockton Bay this is the downside of Shadow Stalker's new powers and she is finally killed by very powerful lamps.
  • In Nosflutteratu, Fluttershy explains that sunlight weakens vampires preventing them from using abilities like transforming into a bat.
  • Principal Celestia Hunts the Undead: Ghasts are a form of undead that are particularly vulnerable to light - full exposure is almost always fatal in a very short time, unless they can get out of it quickly enough.
  • The Life and Times of a Winning Pony: Direct sunlight interferes with necromantic energy, and as a result undead creatures are weakened (or in some cases outright destroyed) by being exposed to daylight or daylight-based spells.
  • Princess of the Blacks: Between the vernal and the autumnal equinoxes, while the days are longer than the nights, black magic is weakened and white magic is strengthened. And on the summer solstice itself, black mages are rendered feverish and comatose from sunrise to sunset. The same applies in reverse to white mages, who are helpless on the winter solstice.
  • The unseen monster in Mother of Invention is never active during the day, from which Applejack correctly deduces it is vulnerable to bright light. This enables her to finally defeat it by restoring the power to the underground facility where it hides.

    Films — Animation 
  • Fantasia: Chernabog is interrupted when light shines on him, causing him to wince and shield his eyes.
  • Hotel Transylvania: Dracula and his daughter Mavis only go outside at night because the sun will cause them to turn to dust and disintegrate.
  • Rock-A-Doodle: The Owls hate any kind of light, even something minuscule like a flashlight. Sunlight is enough to actually strip the Grand Duke of his powers and turns him smaller than a mouse.

    Films — Live-Action 
  • Blade Trilogy:
    • In Blade (1998), the vampires have some kind of realism — no religious material is involved, but they're allergic to garlic and silver, and get severely burned by sunlight. So Blade tortures a vampire with a UV lamp, eventually burning him to death.
    • In Blade II, Blade's new sidekick builds UV grenades.
    • In Blade: Trinity, Abigal Whistler uses a bat'leth-like weapon that has a UV beam instead of a blade.
  • Embrace of the Vampire (2013): Have stabbed the vampire through the hear with with a sharpened cross, Charlotte finishes him off by ripping down the curtain and exposing him to the direct sunlight: causing to burst into flames.
  • Gremlins: Strong light will hurt Mogwai and Gremlins, sunlight will kill them. Subverted in one case in Gremlins 2: The New Batch when the Gremlins raid a genetics lab and the Brain-Gremlin injects the Bat-Gremlin with an anti-UV potion so he can go and wreck havoc in the city. Fortunately, he didn't think to use it on any of his other brothers...
  • Hostile: Harry tells Juliette over her radio that Reapers hate the light. She uses this knowledge and shines a bright light on the Reaper to ward it off.
  • Nosferatu is usually credited as the origin of the idea that sunlight kills vampires.
  • Pitch Black: The alien monsters are burned by light. Additionally, Riddick's eyeshine treatment leaves him easily blinded by bright lights.
  • Space Amoeba: Ganimes' eyes are very sensitive to anything too bright.
  • Mr. Freeze at the end of Batman & Robin. It wasn't entirely the sunlight, as much as it was the warmth of the sun's rays after his freeze suit had malfunctioned.
  • In Underworld, vampires are sensitive to ultraviolet light. The protagonist therefore uses ultraviolet light producing ammo to great effect.
  • Legend (1985): At the beginning, Darkness says: "Sunshine is my destroyer." Near the end we see what he means: when he's hit by the reflected light of the sun he's Blown Across the Room as if it were a giant bullet hitting him.
  • Taken Up to Eleven in Daybreakers, where the light actually burns the vampires alive.
  • Fright Night (1985): When Charley and Peter Vincent confront the vampire Jerry Dandrige in the cellar where his coffin is located, they destroy him by ripping the coverings off the windows and allowing the sunlight inside.
  • Fright Night (2011): Jerry exploits this to Kick the Dog. He allows Charley to "rescue" one of the girls he'd kidnapped and already converted, just so he could see the look of horror on the boy's face as she disintegrated into ashes.
  • In the British parody horror B-movie I Bought a Vampire Motorcycle, the titular monster is eventually killed by being lured into a gymnasium and trapped in a circle of tanning beds.
  • Near Dark: Depending on the strength the daylight and the length of exposure, vampires will either smoke, burn, or explode.
  • The Eye Creatures: The titular creatures can be taken down by ordinary car headlamps. A camera flash was enough to instantly vaporize one.
  • Game of Death: Kareem Abdul Jabbar's character loses significant strength when Bruce Lee smashes the windows and lets the sunlight hit Jabbar's lizard eyes.
  • In Halloweentown, the villain's powers are at their strongest in darkened areas like the movie theater. The radiance from Merlin's Talisman destroys him.
  • Richard Matheson's novel I Am Legend has three official adaptations; The Last Man on Earth with Vincent Price, The Ωmega Man with Charlton Heston and I Am Legend with Will Smith. In all the Last of His Kind homo sapien has to fight hordes of vampire-like creatures that are harm by sunlight and bright lights.
  • Cailban in Logan is burnt by sunlight requiring him to wear a hat and googles whenever he’s outside, Cailban himself lampshades it, likening himself to Nosferatu at one point. Donald Pierce has a particularly cruel Kick the Dog moment where he forces Cailban into some sunlight as torture.
  • Rolli – Amazing Tales: When the High Priest is forced to enter the Rölli Forest from the Trashers' Collapsing Lair, his face starts deteriorating. He says this is because the light and purity of the forest are detrimental to evil creatures such as him. He claims that this will be remedied once the Trashers are revigorated and the forest destroyed through pollution, but he's killed before this claim can be put to the test.
  • The Monster (2016): The eponymous monster is averse to bright light and will retreat from it.
  • Kiss of the Damned: Vampires can be killed by sunlight here, as usual. Maia is killed this way in the end.
  • At the end of Dracula vs. Frankenstein, the Monster forces Dracula out of the church and into the surrounding forest, where a fierce battle ensues between the two monsters. Dracula tears off the Monster's arms and head, but gets caught in the rays of the sun before he can make it back to his coffin and disintegrates into dust.
  • Since Frostbite takes place during the arctic night the vampires are never exposed to sunlight, but through out the film they are shown as hating strong light of any kind.

    Live-Action TV 
  • Automan's title character himself is not adversely affected by sunlight, but his physical form takes so much electrical power to maintain that he normally can do it only during offpeak hours of the local electrical grid, which is predominately nighttime.
  • Buffy the Vampire Slayer and sister series Angel vampires have a strange version of this. Direct sunlight will almost instantly immolate them, but they are portrayed as perfectly fine operating during the day as long as they remain in the shade. They can even move around in sunlight while covering themselves up with a jacket or hoodie - though if that cover gets pulled off, they'll fry immediately.
  • In Castle, a case involving vampire fetishists uncovers an obsessively fixated "vampire" whose skin burns when it makes contact with light. Turns out he has an exceptionally rare skin condition.
  • Doctor Who:
    • "The Vampires of Venice": The "vampires" are weak to light because they're actually Fish People. The young women they're converting develop this even before the transformation is complete — Isabella is captured during the escape because she flinches away from a ray of sunlight hitting a door.
    • "The Ghost Monument" has the Remnants, killer cloth developed as weapons that are inactive in the daytime.
  • In the Farscape episode "Crackers Don't Matter", Moya's crew is warned that "lower species" sometimes experience impaired judgment from the light of the pulsars they are traveling through. The trope is subverted when Crichton realizes that T'raltixx is causing their symptoms, not the pulsars. T'raltixx himself is an inversion, drawing his power from light and planning to use Moya to provide the light his people need to become a large-scale threat.
  • The title character in Fireman originally came from the Earth's core, so exposure to sunlight in his powered form for more than three minutes could kill him. He even had a light that worked like a "Color Timer" that alerted him.
  • The Goosebumps episode "Welcome to Dead House". As in the novel it's adapted from, the (kind of) undead townsfolk of Dark Falls are cannibals who are weakened by daylight, and can be killed by direct sunlight. Instead of pushing a tree over to expose the sun, the Bensons smash out a window inside of a house during The Siege after the townspeople have managed to get inside of the house, causing their undead neighbors to disintegrate into Empty Piles of Clothing. Unlike the book, it appears as if this does permanently kill them, and the Twist Ending is something completely different.
  • The Orville: The antagonist species, the Krill, die if exposed to strong enough UV light. This is why they wear helmets on Earth-like worlds.
  • The giant winged serpent in the Sanctuary episode "The Depths" is intolerant of sunlight. This is what kicks off the plot initially. Remembering this helps Magnus and Will sneak past it later in the episode.
  • Smallville, Bizarro is a sort of opposite to Clark Kent. Kryptonite makes him stronger and sunlight makes him weaker.
  • Star Trek: The Original Series episode "Operation: Annihilate!" The parasites that infected the colonists on the planet Deneva are destroyed by bright light.
  • Star Trek: Discovery establishes that Terrans are significantly more sensitive to light than Prime-universe humans; this is why Evil Is Not Well-Lit.
  • True Blood: Vampires who meet the sunlight directly explode into flames. In the season 1 finale, Bill demonstrates the extent to which it weakens them by going out during the day to save Sookie from Rene (although it's sort of a Senseless Sacrifice since Sam had already saved her). Sookie finds him burning under the sunlight a few moments later and she and Sam get him under cover again. Older vampires are even more susceptible; the 2000-year-old Godric Disappears into Light within seconds of exposure.
  • Speaking of Ultraman, the Underground people from Episode 22 died when a captured Hayata transformed into Ultraman in their presence, and the light from the transformation was too much for them.
  • In an episode of The X-Files, one of the Monsters of the Week was explained as someone suffering from a similar skin condition. In truth, no, he was a freakin' vampire.

    Myths & Religion 
  • Vampires traditionally avoided sunlight, though the idea that it would rapidly kill them is a modern invention.
  • In Norse mythology, Thor tricks the dark elf Alvis to stay up answering questions until the sun rises and kills him.
  • In Scandinavian folklore trolls either turn to stone or explode when exposed to sunlight.

    Visual Novels 
  • Kubitarou from Spirit Hunter: NG is sensitive to light, and will disappear if a strong light is shone on her. This is justified as Kubitarou having oxyopia when she was alive; her acute eyesight caused her to be overly sensitive to light, which became a straight-out weakness when she became a spirit.

    Web Animation 
  • DSBT InsaniT: Averted with Boo, as he gladly tells Bill after his Light Beam fails to harm him.

  • Champions of Far'aus: Subject x9x is reduced to an agonized, screeching blob when Flamel activates the light spell Hyperion provided.
  • Derelict: The various Miasmic races are hurt by light — specifically, ultraviolet light. Long-term exposure to sunlight slowly burns them to death, while UV weapons can be used to great effect against even the largest members of their species.
  • Stand Still, Stay Silent: Rash creatures are highly sensitive to sunlight, and direct exposure to it burns and eventually kills them; as a result, they're nocturnal by obligation and can't move in the open during the day unless it's raining or heavily overcast. Some develop natural armor and thickened hides which afford them some protection, but even these can only roam outside during twilight hours. UV radiation seems to be factor in this weakness, since soiled gear can be sanitized by being put under a UV lamp or left in the sun long enough.
  • Charby the Vampirate: Most of the vampires will burst into flame and be reduced to ashes near instantaneously if exposed to direct sunlight.
  • Goblin Hollow: The gargoyles are an indirect example. Sunlight doesn't directly harm or weaken them, but since they are immobilized by direct observation (in the same vein as Doctor Who's Weeping Angels), they are much less dangerous in a well-illuminated area.
  • The Order of the Stick: Sunlight inflicts Deader Than Dead on vampires within seconds. The vampire cleric Malack created a custom spell to negate this vulnerability. When he's in the desert, a timely Dispel Magic reduces him to ash.

    Web Original 
  • Vamp of the Whateley Universe. She's an albino with vampiric powers, and she's sensitive to sunlight. Carmilla used to be extremely sensitive, and wore special protective armor so she could go out during the day.
  • As DIO is still a vampire in Vaguely Recalling JoJo, he carries around an umbrella to protect himself from the sunlight.
  • In Brennus, the Dark's wraiths are weakenend by light.
  • In The Sanguine Chronicles, sunlight doesn't directly harm vampires, but it does disable their supernatural powers.
  • SCP Foundation
  • The world of Taerel Setting has the kin'toni whom are vampic monsters that happen to be harmed by light, driving the kin'toni into caves and ruins during the day. Sunlight cases a kin'toni body to reject their own tissues.
  • Hamster's Paradise: The troglofauna living in the Sub-Arcuterran Cavern System are completely blind as they lack eyes but they do have patches of skin on their bodies that can detect light and they will instinctively flee from it. The reason for this is to deter them from traveling to the surface where they are at a distinct disadvantage to the sighted predators living there. Some of the insects and fungus living in the caves have evolved to take advantage of this by developing bioluminescence that scares away any troglofauna trying to eat them.

    Western Animation 
  • Two of the ghosts from the Chest of Demons in The 13 Ghosts of Scooby-Doo were vulnerable to sunlight:
    • Queen Morbidia from "Me and My Shadow Demon" was defeated when exposure to sunlight turned her into ash, afterwards her ashes were swept up and put into the Chest of Demons.
    • Rankor from "Coast-to-Ghost" was a vampire ghost, so naturally he had a weakness to sunlight. When he's about to be destroyed by sunlight, though, he willingly goes back into the Chest of Demons when Scrappy and Flim-Flam offer it as a way to escape the sunlight.
  • Adventures of the Galaxy Rangers: Starstones, a rare gem that is often used as an Amplifier Artifact is extremely fragile, and decays rapidly when exposed to UV light.
  • Being a vampire, Marceline from Adventure Time can't be in sunlight without an umbrella or some kind of shade, or she'll burn and die.
  • Alfred J. Kwak: Alfred manages to defeat the Evil Spirit of Darkness when he realizes that shining a bright light in the genie's face hurts it to the point that it would prefer going back inside the bottle. Alfred even removes his lamp for a few seconds just to annoy it, prompting a partial re-emergence by the genie, before forcing it into the bottle completely.
  • In Archie's Weird Mysteries, a vampire explains to the titular character that while the Vampire Master can't ever handle sunlight, lesser minions like herself can if they stay in human form and "wear some serious sunblock".
  • Ben 10:
    • Original Series: Introduces Zs'Skayr, a subconscious alien that broke free from the Omnitrix with plans to take over. When Ben used his DNA as Ghostfreak, he had a sun-proof cloak that hid his true appearance, restricted his power, and protected him from sunlight (which could burn him to death). But when he went rogue, he got rid of the sun-cloak and went out his way to make the world filled with darkness.
    • Ben 10: Omniverse: Introduces Whampire who is, well... a vampire (actually an alien called a Vladat). Although he's only incredibly weakened and in pain when faced with light instead of being killed by it. This weakness also applies to Vladat's genetic source in the alien form's debut episode, Lord Transyl.
  • Gargoyles turn to stone at sunrise, which leaves them defenseless against enemies. Thus, a common way to kill them is to pulverize them while in stone sleep.
  • Zartan from G.I. Joe: A Real American Hero. The experiments done on him give him amazing powers, but a severe weakness to sunlight. Exactly how it works and what qualifies as enough sunlight seems to vary from episode to episode. Eventually, the writers got rid of it. In any case it was basically just a way to promote his toy, which changed color in sunlight.
  • The He-Man and the Masters of the Universe episode "Night of the Shadowbeasts'', the eponymous beasts not only hate sunlight, but moonlight as well. To use them, Skeletor causes a volcano to erupt, filling the sky with smoke and ash.
  • D'Compose and his undead underlings from Inhumanoids were vulnerable to sunlight, which had the added bonus of turning humans who had been zombified by D'Compose back to normal.
  • The Imperium in Justice League had no resistance to sunlight.
  • The Owl House: King claims that demons with large black eyes tend to be sensitive to bright light — this is useful for stunning or Eda's Owl Beast form when she transforms.
  • The Powerpuff Girls episode "Boogie Frights" had the Boogie Man and his minions being allergic to the sun so they block it with a giant disco bulb, eventually once the girls destroy it the sunlight disintegrates them.
  • In Primal (2019),the nocturnal Night Feeder has an extreme sensitivity to light or fire as a brief spark makes it pull back and a small fire is enough to send it into a full-blown retreat. Spear and Fang use this to their advantage by making strategic sparks to force it into a circle of trees that they ignite and form a ring of fire to prevent it from escaping giving Spear to toss a lit spear in its body, setting it ablaze.
  • The Secret Saturdays: In "The Owlman Feeds at Midnight", the titular Monster of the Week really doesn't like fire or bright light. The Saturdays use this to try and subdue it, but Doyle ends up giving it too much light when he resorts to bringing a jetpack into the mix and ends up vaporizing it.
  • The Nightbreed from Static Shock. Continuous exposure to light seems to leave them very weakened and feeling sick.
    • Ebon also counts, although he can come out in daylight and be just fine. Only a focused beam of light seems to weaken him.
  • Storm Hawks: In their debut episode, the Nightcrawlers have a bad case of this — they're deadly when stalking around darkened locations or when it's night, but they're pained and quickly driven off by a blast of light from Solaris Crystals. They're upgraded to overcome this weakness in later appearances.
  • The Kanabo in Teenage Mutant Ninja Turtles: Fast Forward are weak against sunlight. Light is also Sh'Okanabo's weakness, as revealed in the penultimate episode "The Day of Awakening". Hence, why Sh'Okanabo wanted to block out the sun so it wouldn't interrupt his plans to cover the world with Kanabo drones again.
    Viral: Analysis indicates that the unique wavelength of this planet's solar radiation's focus through its unusually oxygenated atmosphere has a dire effect on the emerging symbiosis. In other words...
    Sh'Okanabo: All of my efforts have been in vain! The Kanabo cannot survive on Earth. (Angrily roars as he throws a temper tantrum and tosses everything around in his ship) This place could sustain us for centuries if not for its accursed sun... But perhaps... That obstacle can be eliminated. (laughs evilly)
  • Mumm-ra from ThunderCats (2011) has this as his Weaksauce Weakness, though interestingly enough his earlier counterpart didn't. (He was instead vulnerable to his own reflection.)
  • Trolls from Trollhunters are a magical, stone-based species that originates from deep within the Earth. Should a troll's skin touch sunlight (with the exception of Changelings and Stalklings), they become inert stone.
  • In Xyber 9: New Dawn, The Machina can't handle sunlight due to the virus they're all infected with.

    Real Life 
  • Due to their soft, moist bodies being sensitive to heat and dehydration, earthworms spend much of their lives underground and display an aversion to bright light (they lack eyes, but have light-sensitive cells in their skin). They also die quickly when exposed to direct sunlight.
  • There’s a reason the genetic disorder Porphyria is nicknamed the Vampire Disease. The skin literally blisters when exposed to sunlight along with oodles of other unfortunate side effects.
  • The sun can cause sun burns and skin cancer. The genetic disorder xeroderma pigmentosum removes the body's ability to repair damage caused to the skin by ultraviolet radiation; as a result sufferers are highly vulnerable to skin cancer and must avoid sunlight as much as possible.
    • Relatedly, it's entirely possible to get a fatal sunburn if you are very pale and are outside with no clothes or sunblock all day.
  • Albinos do not like direct sunlight — they have no melanin to delay sunburn, and in bright light their eyes hurt and see even worse than they do normally ("normal" being half-blind).
  • Every species of plant has evolved to tolerate specific amounts of sunlight (usually divided by horticulturalists into three categories: Full sun, Partial sun, and Shaded). Plants that tolerate heavy shade will be killed surprisingly quickly by too much direct sunlight. For reference, most house plants are shade tolerant (or prefer indirect or filtered sunlight).
    • Lower school science teachers will probably have a story about this. Many textbooks will encourage teachers to demonstrate photosynthesis by taking two cuttings from some decorative plant that is available and placing one in the light and the other in the dark. The idea being that the plant kept in the shade will wither and die while the one kept in the sun will prosper. Since most house plants fall into the shade tolerant category, the experiment will often produce the opposite of the intended results.
  • People with Photophobia can experience a range of symptoms ranging from discomfort and sensitivity to headaches (unless the headaches themselves are the cause of photophobia) when they are in the presence of bright lights.
  • Many geeks, introverts and other people who spend much of their time indoors tend to quip about the "evil daystar" on the occasions that they must go outside during the day. Along with those people that work a graveyard shift.
  • Deepsea life relies so much on the lack of light around it that exposure to what is (to us) normal amounts can prove fatal, ranging from sensory overloading to flat-out blindness. (Most life isn't so much blind as it is supremely sensitive to faint light; that's what anglerfish rely on, after all.) Yes, this means that whenever we manage to capture footage of, say, a gulper eel or a viperfish, it usually ends up dead shortly afterwards- a blessing for the scavengers on the seafloor, a miserable feeling for us. Luckily, scientists are trying to switch over to red light to prevent this from happening. As red barely penetrates through even the surface of the water, most aquatic creatures can't perceive it.

Alternative Title(s): Light Hurts Evil


Rise and Shine.

I'm Batman. And you're dust.

How well does it match the trope?

5 (20 votes)

Example of:

Main / WeakenedByTheLight

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