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Tue, 09 Feb 2010
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 TIME OUT :: Lifestyle |
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Energy-efficient lighting
RESEARCHERS at Rensselaer Polytechnic Institute have developed and demonstrated a new type of light-emitting diode (LED) that may provide better lighting with less energy.
The new polarisation-matched LED, developed in collaboration with Samsung Electro-Mechanics, exhibits an 18% increase in light output and a 22% increase in wall-plug efficiency, which essentially measures the amount of electricity the LED converts into light.
The new device achieves a reduction in “efficiency droop,” a term used to describe a phenomenon that provokes LEDs to be most efficient when receiving low-density currents of electricity, but less efficient as higher density currents of electricity are fed into the device.
While the cause of this droop is not yet fully understood, studies have shown that electron leakage is likely a large part of the problem.
Researchers expect that a new wave of lighting devices based on LEDs and solid-state lighting – where lighting is emitted through a solid object, like a semi-conductor, versus, for example, a gas-tube, as in fluorescent light – will supplant the common lightbulb in coming years.
They further predict that this will lead to vast environmental, energy, and cost benefits as well as innovations in healthcare, transport systems, digital displays, and computer networking. – AFP Relaxnews
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Updated: 10:02AM Tue, 28 Jul 2009
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