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Technology Stocks : Intel Corporation (INTC)
INTC 35.53-1.1%Nov 14 9:30 AM EST
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To: rudedog who wrote (100676)3/11/2000 1:26:00 AM
From: ptanner  Read Replies (1) of 186894
 
rudedog - OT <The majority of the power a lightbulb uses goes out as light, not heat - after all, that's the point of the thing... I think the heat output of a 60W incandescent bulb is about 20W (a little higher for a long-life bulb).>

Nope. Number I recall from school is that for incandescents about 90% of the energy goes for heat not light. Fluorescent bulbs have much better efficiency and LEDs (they just figured out how to make white ones) have very high efficiency.

And if the light bulb is in an enclosed space then all the light ultimately converts to heat.

PT
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