Most address numbers probably don't have back lights, but I suppose if you're going to light them, you might as well do it with solar power and LEDs. That's how it's done with these Solar LED Address Numbers from Think Geek. The numbers turn on automatically and can last up to 10 hours on a full charge. Each number runs about $16. My place is in dire need of a number swap, so I guess these are now at the top of the list. What do you think?
[+] Solar LED Address Numbers at Think Geek.
First noticed at Re-Nest.