A Virginia Tech student has designed and built an LED floor lamp that is powered by gravity, using a weight slide that is expected to last 200 years. The creation puts out the equivalent of a 40-Watt bulb, and lasts four hours per cycle. The lamp won 2nd place in the Greener Gadgets Design Competition in New York City.The lamp is essentially an acrylic lens about 4' high. Electricity to power the 10 high-output LEDs is generated by the slow fall of a mass that spins a rotor. Imagine - no noise, no cords, no batteries. After 4 hours elapses, just raise the weight again and get another 4 hours of free light.
I love it!
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