Laalten.com is a custom search engine powered by Google. It saves energy because the screen is predominantly black. According to a Lab research "A given monitor requires more power to display a white (or light) screen than a black (or dark) screen."
A blog post proposed the theory that a black version of the Google search engine would save a fair bit of energy due to the popularity of the search engine.
Take at look at Google, who gets about 200 million queries a day. Let's assume each query is displayed for about 10 seconds; that means Google is running for about 550,000 hours every day on some desktop. Assuming that users run Google in full screen mode, the shift to a black background will save a total of 15 (74-59) watts. That turns into a global savings of 8.3 Megawatt-hours per day, or about 3000 Megawatt-hours a year. Now take into account that about 25 percent of the are CRTs, and at 10 cents a kilowatt-hour, that's $75,000, a goodly amount of energy and dollars for changing a few color codes.
Laalten.com was created inspired by this idea.In many rural areas, people still dont have electricity. They use lantern(Laalten) etc for lightening their homes at night. We, the privileged onces, enjoy benefits of electricity, while there are people out there who dont have it even for their basic needs. The name "Laalten" is used for reminding us about them.
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