I don't cause my fiance is here, but if I am ever home alone I always have 1 light on. If sleeping alone, I have the hallway light on.
Anyone else a scardy cat of the dark?
I don't normally need light while I sleep, but there have been exceptions.
I was alone because my wife and then young kids were on holiday back home and I had to stay in London to work. At the weekend I went into town and decided to watch a promising-looking SF film called Event Horizon. To my surprise it ended with people stabbing their eyes out and talking backwards in Latin (which is not in any space travel manual I'm aware of).
So okay, I go home to the empty family home. I muck around on IRC or whatever for a few hours, maybe watch a bit of television, then go upstairs to bed.
At the top of the stairs I have to walk along a thin walkway with one of my kids' bedroom doors on the left, to the master bedroom at the end. At that exact moment the draft of my passage down the hall caused a deflating helium balloon in the child's bedroom to bob under the door lintel into my path.
I slept with the light on that night. I joke about that with my family, it's one of my favourite stories.