RT @FastCompany: A $5 LED Lamp Powered By Sand And Gravity http://t.co/1lWb1EHY 0 atbildes

	Juris Petersons (2012-12-15 10:51:38) @twitter	RT @FastCompany: A $5 LED Lamp Powered By Sand And Gravity http://t.co/1lWb1EHY