I keep a small 9V battery clip-on flashlight in the drawer next to my bed. My bedroom window gives on the side windows of another apartment building, so sometimes when I need to check things in the night (assuming the blinds are up to let some fresh air in), I will use this dim light instead of closing the blinds and turning on the regular lamp.

If I need a more powerul lamp, there's one next to the microwave in the kitchen.