The Anglican Church of Canada is asking:

Will you be joining nearly a billion people around the world in turning off the lights on Sat., March 27, at 8:30 p.m.?

Here’s my plan for March 27th, 8:30 p.m.

Update: I see others have the same idea. I’m considering buying a couple of 2KW floodlights to illuminate the sky above my house during Earth Hour.