The Environmental Activists of Casady High School in Oklahoma City, Oklahoma know that all it takes to make a difference is for each person to "turn on their lightbulb." An energy efficient compact fluroescent lightbulb, that is. The group of dedicated and ambitious student activists came up with a plan to give away one energy efficient light bulb to every student and faculty member in their high school, in order to raise awareness about global climate change and the easy steps anyone can take to make a difference.