Gravia, a gravity based kinetic energy lamp concept, wowed our panel judges and the crowd at the Greener Gadgets Conference, earning a second place accolade in the design competition. Created by ...

Virginia Tech. "Gravity Powered Lamp, Designed By Student, Could Provide As Much Light As 40 Watt Bulb." ScienceDaily. ScienceDaily, 22 February 2008. <www.sciencedaily.com / releases / 2008 / 02 ...