GravityLight is an innovative device that generates light from gravity

Although it seems like a basic need, not everyone in the world has access to electricity, making lighting and other daily chores somewhat difficult. GravityLight lamp was created to help solve this problem since it is moved only by gravity, with no need for battery, sunlight or electricity to … – http://dailycrawler.com/gravitylight-is-an-innovative-device-that-generates-light-from-gravity/

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