please list sources
2007-12-03 10:57:03 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
he said it first. almost zero heat.
2007-12-03 11:00:14 · answer #1 · answered by Anonymous · 0⤊ 2⤋
Do they? Not really. Modern commercial LEDs are more efficient than incandescent lights but can still barely compete against a fluorescent. And they can certainly still not compete against a low pressure sodium lamp.
http://en.wikipedia.org/wiki/Lighting_efficiency#Lighting_efficiency
One day, maybe, LEDs will be the ideal light sources. Today... no, not yet.
2007-12-03 11:04:38 · answer #2 · answered by Anonymous · 2⤊ 1⤋
They don't have a filament, so they are producing light via the movement of electrons without the wasted energy that goes into making normal lights hot.
2007-12-03 11:00:21 · answer #3 · answered by Not Quite Agnostic 2 · 0⤊ 0⤋
They produce less light that is not visible to the human eye like infrared. There is a whole spectrum of light that is wasted on us with normal light bulbs.
2007-12-03 11:02:48 · answer #4 · answered by Anonymous · 0⤊ 0⤋
If you meant energy, the answer is... different method of generating light. The incandescent bulb actually converts more than 90% of energy into heat instead of light. LED's simply... more efficient in its process.
(See http://en.wikipedia.org/wiki/Light_bulb)
2007-12-03 11:04:37 · answer #5 · answered by Kasey C 7 · 1⤊ 0⤋
Since, they are diodes, rather than normal lights.
Which is why normal lights are rated in hours and watts
and LEDs are rated in frequency and mW.
2007-12-03 11:06:00 · answer #6 · answered by Anonymous · 0⤊ 5⤋
they are more energy efficient because they create less heat.
2007-12-03 10:59:11 · answer #7 · answered by air.mage 2 · 2⤊ 0⤋