I never really sleep in total darkness and I have kept a light on most of the time and if the light goes off I wake up. But I am curious about this after reading the thread about the girl being shot after she broke in a home. I have a laser sighted 229 that I sleep with but the room is either lit by one light or the tv or next to a room with a light. Of course the dogs walk through the home regardless. So how about you folks? Lights in room or total darkness?