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Join the fight, install this script on your pages and let your users save energy :



You can change the save time parameter in minutes. Default is 7 but you can change the number after the "Minutes=" parameter.

How does it work?
The script detects user inactivity and redirect the browser to the black page. Inactivity time can be setup (save time parameter).
Users can also launch manually the black page by clicking the green button "lights out" created by the script.

LIVE DEMO
(set to 1 minute of inactivity, button set on the bottom)