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jstsch
on Dec 21, 2012
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A $5 Lamp Powered Solely by Gravity
Similar in concept to the Waka Waka light, except that's powered by a solar panel (and some quite nifty electronics):
http://www.wakawakalight.com/
Join us for
AI Startup School
this June 16-17 in San Francisco!
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Search:
http://www.wakawakalight.com/