Funny thing is that we mostly turn on the lights to keep burglars at bay. I don't have the link but there was some article pointing out that burglars also don't really like dark places. Like using flashlight inside of dark building can easier give out break in. Burglars are also people so they kind of scared of what might be in the dark, like you might miss something on the floor and break your leg or arm and then you would be stuck at the place you broke in.