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It's more efficient in the manufacturing phase (1 LED instead of 2 or three.) But a 3 LED RGB light can produce softer light, with more lumens per watt.
by ocschwar 10y ago
It's more efficient in the manufacturing phase (1 LED instead of 2 or three.)
But a 3 LED RGB light can produce softer light, with more lumens per watt.
- mark-r 10y agoI believe the part about RGB producing softer light, but the higher efficiency is new to me. Do you have a source?
- sp332 10y agoIf you have a bluish LED, you can make it warmer by blocking some of the blue light. But this hurts the efficiency.
- ocschwar 10y agoIt's pretty much a set pattern through the whole electromagnetic spectrum: The longer the wavelength, the easier it is for manmade artifacts to produce it. All the way from AM radio to X rays. The shorter the wavelength, the harder the tradeoff between the expense of manufacturing the device and the cost of energy to use it. That's why if you were tinkering with electronics in the 90's, you watched how LED makers started with red, then made green ones, and what a big deal it was when the first blues came out. They were faint, and expensive. It took some time for them to become practical.
- mark-r 10y agoI remember reading how rare and expensive blue LEDs were, then found one being used for the high-beam indicator in my 1985 Volkswagen. Made me wonder what all the fuss was about. It still doesn't answer my question about efficiency.