Solar Cells with LEDs Provide Inexpensive Lighting
Monday, November 9, 2009 - 12:21
in Physics & Chemistry
(PhysOrg.com) -- Of the 1.5 billion people in developing countries who do not have electricity, many rely on kerosene lamps for light after the sun goes down. But now, researchers from Denmark have designed an LED lamp that runs on solar cells, which costs less than one-quarter of the annual cost of using kerosene lighting. The solar-LED lamps are expected to last at least a year, making them an affordable alternative to kerosene.