GravityLight gets brighter, tougher and easier to use
Price: $ 24.99
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The GravityLight was designed to replace the use of kerosene lamps in the developing world. It uses a weight to drive a gear-train and generate electricity from the kinetic energy created. Now, a new version of this safe, cheap and convenient lighting solution has been created.
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GravityLight: the innovative device that generates instant off-grid light from the lift of a weight - BrightVibes
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Gravity Light. How Does it work ??
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