A poorly executed child-in-peril piece of fright-free crud involving a deadly ghoul you can only see when the lights are out. So, why not stock up on high-powered torches? It's a weak horror premise, poorly done.
At 81 minutes, unfolding in a handful of key locations, and opting for practical effects and clever framing over computer-generated imagery, Lights Out is still lean and concentrated, and it benefits from that spareness.
Unfortunately, like many dime-a-dozen horror films, Lights Out suffers from an all-in approach, choosing to simply attempt to scare the viewer by any means necessary rather than working on making it genuine.
Although the movie doesn't offer much in the way of characterization, its cheap thrills are manufactured effectively, like an amusement-park ride designed to rattle the nerves.