Get out your stepladders. In celebration of Earth Day, Home Depot will give away 1 million n:vision Compact Flourescent Lightbulbs to customers who visit any Home Depot store in the contiguous 48 states.

This lucent bonanza is part of Home Depot’s Eco Options program: products in their stores with the Eco Options seal have less of a negative impact on the environment than products without it. It might be a good idea to switch to CFL anyway, since they use about %75 less energy than traditional incandescent bulbs and last 10 times as long.

This is like Ben and Jerry’s free ice cream day for the environment, unless you live in Hawaii or Alaska, in which case you’re doomed to live in wasteful brightness.