History YMMV / LightsOut2016

* FanPreferredCutContent: Some consider the original ending (which takes place after the theatrical ending scene) where the villain makes one final attack on the siblings to be canon, given that it avoids the UnfortunateImplications about [[spoiler:suicide being a solution to problems]] without requiring the need for a sequel.

** Good theory, but unlikely. In the film, she sees Diana and does the sequence of flipping the light on and off to see that she's only there when the light is off, and Diana moves closer to her at the end of the scene, which plainly frightens her. She wastes no time telling Paul there's something strange going on and beats it out of there. In the short, which one would logically assume takes place after this encounter if she was the same character, she's clearly confused by the apparition, gives no sign of having seen it before, and once again experiments with the light. If she was the same character, especially since she was so frightened in the warehouse, her reactions probably would have been very different.

** Good theory, but unlikely. If the film, she sees Diana and does the sequence of flipping the light on and off to see that she's only there when the light is off, and Diana moves closer to her at the end of the scene, which plainly frightens her. She wastes no time telling Paul there's something strange going on and beats it out of there. In the short, which one would logically assume takes place after this encounter if she was the same character, she's clearly confused by the apparition, gives no sign of having seen it before, and once again experiments with the light. If she was the same character, especially since she was so frightened in the warehouse, her reactions probably would have been very different.

** Good theory, but unlikely. If the film, she sees Diane and does the sequence of flipping the light on and off to see that she's only there when the light is off, and Diane moves closer to her at the end of the scene, which plainly frightens her. She wastes no time telling Paul there's something strange going on and beats it out of there. In the short, which one would logically assume takes place after this encounter if she was the same character, she's clearly confused by the apparition, gives no sign of having seen it before, and once again experiments with the light. If she was the same character, especially since she was so frightened in the warehouse, her reactions probably would have been very different.

* AuthorsSavingThrow: David Sandburg intended it to be just one standalone story with no thought toward sequels, but then started writing one entirely because of [[spoiler:the FocusGroupEnding inadvertently giving the message that depressed people should kill themselves.]]

* BrokenBase: Which is better? The feature length film or the original short? Those who prefer the movie, love how it expands upon the original concept and gives us entertaining and interesting characters. Those who prefer the short, think the film stretches the premise thin and think giving Diana a backstory at all is completely unnecessary and diminishes the mystery of her presence in the original short.

* BrokenBase: Which is better? The feature length film or the original short? Those who prefer the movie, l ove how it expands upon the original concept and gives us entertaining and interesting characters. Those who prefer the short, think the film stretches the premise thin and think explaining Diana's backstory at all is completely unnecessary and diminishes the mystery of her presence in the original short.

* UnfortunateImplications: If you want to take the interpretation of Sophie's depression manifesting into the ghostly Diana then the ending where [[spoiler: she kills herself to get rid of Diana, gives off the unintentional message that if you suffer from depression and you're hurting your family, you should just kill yourself, because they'll be better off without you.]] [[http://www.avclub.com/review/scariest-thing-about-lights-out-what-it-says-about-239598 This hasn't gone unnoticed.]] David Sandberg has revealed that [[spoiler:this is actually a FocusGroupEnding, as originally her suicide didn't actually help, which audiences complained [[SenselessSacrifice made it feel pointless]]. He actually suffers from depression himself, and has lived through a friend committing suicide, and was horrified to realize how people were taking the revised ending.]]

* FanPreferredCutContent: Some consider the original ending (which takes place after the theatrical ending scene) where the villain makes one final attack on the siblings to be canon, given that it avoids the UnfortunateImplications about [[spoiler:suicide being a solution to problems]].

* {{Fanon}}: Fans of the film and original short tend to theorize that [[spoiler: Escher is the character of the 2013 short since we don't see her again]]. Considering that most (if not ''all'') of Sandberg's shorts have Lotta be TheChewToy of them, it wouldn't be surprising.

* HilariousInHindsight: Diana is played by professional stunt Alicia Vela Bailey. One year after this movie, she'll be the stunt for [[Film/WonderWoman another character with the same name.]] Both films would even end up tied together when Film/Shazam2019 featured a cameo of Mrs. Glover now working as a foster care counselor.

* CompleteMonster: [[EnfantTerrible Diana Walter]], a sociopath since the day she was born, is sent to a mental institution after she played mind games with her father, ultimately causing him to [[DrivenToSuicide kill himself]]. While there, she manipulates a depressed Sophie [[FalseFriend into becoming friends with her]], and became physically abusive towards her, going as far as to break her legs when she heard that Sophie might be getting released. As a [[LivingShadow ghost]], she latches herself onto Sophie, enslaving her in the process. Wanting Sophie to herself, she murders both of her husbands when they attempted to heal their wife's mind, and she stalks and terrorizes Sophie’s children Rebecca and [[WouldHurtAChild Martin]], eventually opting to kill them in utter defiance of Sophie's demands. When two police officers are alerted on a potential break in, they go to investigate; Diana savagely murders both of the officers, and attempts to kill Rebecca in front of Sophie. Self-serving and hostile, Diana sought complete control over Sophie's body, and would murder anyone who came in her way.

* CompleteMonster: A [[TheSociopath sociopath]] since the day she was born, [[EnfantTerrible Diana]] is sent to a mental institution after she played [[MindScrew mind games]] with her father, ultimately causing him to [[DrivenToSuicide kill himself]]. While there, she manipulates a depressed Sophie [[FalseFriend into becoming friends with her]], and became physically abusive towards her, going as far as to break her legs when she heard that Sophie might be getting released. As a [[LivingShadow ghost]], she latches herself onto Sophie, enslaving her in the process. Wanting Sophie to herself, she murders both of her husbands when they attempted to heal their wife's mind, and she stalks and terrorizes Sophie’s children Rebecca and [[WouldHurtAChild Martin]], eventually opting to kill them in utter defiance of Sophie's demands. When two police officers are alerted on a potential break in, they go to investigate; Diana [[CopKiller savagely murders both of the officers]], and attempts to kill Rebecca in front of Sophie. Self-serving and hostile, Diana sought complete control over Sophie's body, and would murder anyone who came in her way.

* HilariousInHindsight: Diana is played by professional stunt Alicia Vela Bailey. One year after this movie, she'll be the stunt for [[Film/WonderWoman another character with the same name.]]