Friday, January 19, 2007

Can LED's really have this impact?

I know this is a little off topic - but look at the figures for money and CO2 saved!

Cheaper LEDs to light a green path? | Tech News on ZDNet

The future of light is plastic, Cyberlux says.

The company, which specializes in light-emitting diodes, plans to reveal in about four months prototypes of a new style of white-light LEDs that would both cost substantially less to manufacture and provide more light than conventional LEDs.

Combined, the two advantages would enable light fixtures based on LEDs, which are now relatively expensive, to better compete with traditional lamps based on conventional glass bulbs and fluorescent lights, according to Cyberlux President Mark Schmidt.


Approximately 22 percent of the electricity consumed in the United
States goes toward lighting, according to the U.S. Department of

To make matters worse, traditional lightbulbs are incredibly
inefficient. Only about 5 percent of the energy that goes into them
turns into light. The majority gets dissipated as heat. Fluorescent
bulbs are much more efficient but aren't as prevalent, particularly
inside homes. LED advocates say their devices will beat fluorescent

In a speech last year, DenBaars said that if 25 percent of
the lightbulbs in the United States were converted to LEDs putting out
150 lumens per watt (higher than the current commercial standard), the
country as a whole could save $115 billion in utility costs,
cumulatively, by 2025. That would alleviate the need to build 133 new
coal-burning power stations, he said.

In turn, carbon emissions in the atmosphere would go down by 258 million metric tons.

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