DESIGNITIVES: GravityLight. Generating light from gravity.
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GravityLight, a lamp that generates energy using the force of gravity
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GravityLight: lighting for developing countries.
PDF) 132-CP-7 Design & Fabrication Of A Gravity Powered Light
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Light uses energy from falling weight to illuminate homes without electricity
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GravityLight, a lamp that generates energy using the force of gravity
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