Earth Hour

I think I remember this from last year. Worth doing again. My only question is, does a computer monitor count as a light?

We invite everyone throughout North America and around the world to turn off the lights for an hour starting at 8 p.m. (your own local time)–whether at home or at work, with friends and family or solo, in a big city or a small town.

http://www5.earthhourus.org/