Martin Riddiford and Jim Reeves have spent four years developing GravityLight, which uses the Earth’s gravity to generate enough power to light an LED bulb for half an hour — no electrical grid, batteries, or any external generator required. Read more at http://venturebeat.com/2012/12/26/this-5-lamp-is-powered-by-gravity-and-just-destroyed-its-funding-target-on-indiegogo/#sRvrDc6PZypGRkQM.99by (http://venturebeat.com/2012/12/26/this-5-lamp-is-powered-by-gravity-and-just-destroyed-its-funding-target-on-indiegogo/)
Wednesday, January 02, 2013
Gravity Light
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