Catchy poster slogan to encourage kids to turn off lights after use?

Question

Hello ~

I am a teacher in a secondary school, and in an effort to try and get the kids to save energy in a green and efficient way I have decided to launch a poster campain, to put near the light switches.

What would be great with these posters woud be a catchy slogan that would stay in people's heads and encourage them to help save our planet. Does anyone more creative than me have any ideas? I would welcome any responses - no matter how bad you consider yourself as an advertiser! 10 points for the best answer.

Thanks!

Answer 1

 all your answers are shocking, not catchy and don't even rhyme. sort it out.