From the Seattle Times article:
Lights illuminating the Space Needle, downtown high-rises and neighborhood homes could largely go dark from 8:30 to 9:30 p.m. on Saturday, March 28, as part of Earth Hour, an international campaign against global warming. Cities around the globe are expected to take part, and landmarks such as the Empire State Building and the Golden Gate Bridge will go dark.
Apparently didn’t go over well in Ireland because of those damn candles.
I participated! I wonder if there are any stats available from the power companies as to whether or not there was a noticeable difference in energy usage.