what is gravity light ?
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GravityLight is a gravity-powered lamp designed by the company Deciwatt for use in developing or third-world nations, as a replacement for kerosene lamps. It uses a bag filled with rocks or earth, attached to a cord, which slowly descends similar to the weight drive in a cuckoo clock.
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gravity light is a gravity powered lamp designed by the company deciwatt for use in developing or third world nation as replacement for kerosene
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