Thursday, January 29, 2009

New $3 Light Bulb 12 Times More Efficient, Lasts 60 Years [Led]

New $3 Light Bulb 12 Times More Efficient, Lasts 60 Years [Led]

Cambridge University researchers have developed a $3 LED-based lightbulb that is 12 times more efficient than regular tungsten light bulbs, three times more than low energy ones. It lights up instantly, lasting for 100,000 hours,

The cheap lightbulb could cost the energy bill in any house by as much as three quarters. In fact, if everyone replaced their current light bulbs, the proportion of lighting in electricity consumption would go down from 20 to 5 percent worldwide.

They also avoid using any toxic materials, like lead: The new LEDs use gallium nitride, which until now was too expensive to obtain because it had to be grown on sapphire wafers, which brought the cost of the lightbulbs to $28 each.

The new method, developed by Cambridge University-based Centre for Gallium Nitride, uses silicon wafers, bringing the cost down to $3 each. And if you think this is a thing of the future, think again: Prototypes are already being produced and the light bulbs may reach the market in a mere two years. [Daily Mail]



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Wednesday, January 28, 2009

Baby steps: new solar cell efficiency record isn't awe-inspiring

Baby steps: new solar cell efficiency record isn't awe-inspiring


Granted, we've no idea what it takes to really push the efficiency level of a solar cell, but we're getting pretty bored with these incremental improvements year after year. If you'll recall, the record for solar cell efficiency sat at 40.7 percent in 2006, and that was raised to an amazing 40.8 percent last August. Today, researchers at the Fraunhofer Institute for Solar Energy Systems have announced an all new milestone: 41.1 percent efficiency. According to team head Frank Dimroth, the crew is simply "elated by this breakthrough." Meanwhile, the rest of planet Earth is suddenly depressed by the thought of perishing from old age before this data point ever breaks the big five-oh.

[Via Gizmag]

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Baby steps: new solar cell efficiency record isn't awe-inspiring originally appeared on Engadget on Tue, 27 Jan 2009 14:02:00 EST. Please see our terms for use of feeds.

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