Light. Cheap.

Instigated by Dr. Dave Irvine-Halliday, professor of Electrical and Computer Engineering at the University of Calgary, Canada, the Light Up the World Foundation “introduces a safe, simple, healthy, reliable and affordable form of home lighting, using white light emitting diodes. This rugged home lighting system will allow people in some of the poorest and least developed rural communities to light up their homes and raise their quality of living.... The lights are powered by a relatively cheap, belt driven pedal system and rechargable battery. It takes less than half an hour to put enough charge into it to run a set of 8 WLEDs for an entire evening.”

Found via slashdot.