Lights Out is a horror movie about a mental patient, Diana, who haunts the family of Sophie, another mental patient she befriended when they were in confinement. Diana had a rare skin disorder wherein her skin was oversensitive to light. She died when a doctor, in an attempt to cure her, performed an experiment and over exposed her to light.
Sophie, previously confined for depression, got out of the institution. But her depression recurs as Diana’s spirit continues to follow her and gets in the way of her getting any medication. As Sophie’s depression progresses, so does Diana’s presence in her life as her only ‘friend.’ Sophie is lured into surroundings of near total darkness – Diana’s refuge from even the slightest ray of light which can burn her skin.
Unfortunately, Diana is a friend who doesn’t want to share Sophie with anyone else – including her two former husbands who, Sophie was made to believe abandoned her and her children, but it turns out Diana killed.
Diana’s obsessive grip on Sophie goes too far when she goes after Sophie’s children, Rebecca and Martin. Rebecca, having grown into adulthood, moved out of the house where she grew up feeling Diana’s presence. Martin, her younger brother who still lives with his mother, experiences the same presence she did. Rebecca moves back in and, upon learning about Diana’s sensitivity to light, keeps the entire house lighted to keep Diana away. Diana, refusing to be kept away, sabotages the main power source in the basement. She succeeds in luring Rebecca and Martin to the basement, where they remained trapped until the police came to let them out.
In the end, Sophie came out of the dark holding a pistol to her head. Knowing that she was Diana’s only link to the human world, she shoots herself as the only way to stop Diana from killing her children.
This was an apparently fictional movie which has some touch of reality. Depression is definitely real, and it can create a feeling of such intense loneliness that a victim would rather create an imaginary friend than be alone. No matter how sick anyone is in the head, a mother will come to her senses when her children are under attack and need her protection – nothing fictional about that.