Lightbiz LED Motion Sensor Light ($25.99 for pack of two): These light strips come with a small remote control that you can use to dim the lights, and turn them off after 10, 30, 60, or 120 minutes.

Guo Hui built a tiny rechargeable battery into the extended base of a 40 watt LED bulb, which allows it to charge whenever it’s screwed into a standard socket.