Deleted scenes: THIRTEEN minutes of footage
BBFC classified the Lights Out deleted scenes and their run time is 13 minutes.
Now, this film only runs for about 76 minutes without credits. I know editing is all about cutting the excess and the pace, but as much as I loved this movie, it was way too fast-paced. I haven't seen the cut scenes yet, but I feel like 13 extra minutes really could've helped the film just pack a little more of a punch. That brings its run time up to 88 minutes, about 92 with credits.
According to David Sandberg, there was an additional showdown with Diana that was the original ending for the film. Everyone goes home thinking Sophie's suicide solved everything, but it didn't. It was cut because test audiences hated it. I'll be damned if that isn't one of those deleted scenes. I'm excited to see.