Here's some of mine from the home base, have one in both vehicles, Kabota and golf cart. The Emergency Bulb is quite the invention. It has a lithium battery built in, so when the power goes off, it comes on and will stay bright for 8 hours. It also comes with a screw on hook with an off/on switch. I have 8 of them scattered around the house. Once the power is off, you can unscrew the bulb if you don't need the light. Highly recommended.

Pap