Wow...I never thought that by switch off the light can save the earth. Thanks for posting this. But i'm just lucky cause I prefer to stay in the dark once I get at home or even in my room. Before this i try to avoid stay under the light cause its make me felt like melting but of course not under the sun cause I love sea and only sea can offer great sunlight. My friends call me "orang gua" cause of my bad habits. Now I know what to tell them....at least I got reason to my abnormal habits...harharharharhar!! This post is interesting and its wake me up!!