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I see these have a yellow filter on the outside. That means they're throwing away light to get the right color. I think that's nuts, considering how hard it i
by ScottBurson 15y ago
I see these have a yellow filter on the outside. That means they're throwing away light to get the right color. I think that's nuts, considering how hard it is to get that much light out of LEDs to begin with. I hope they make a version without the filter.
- bradfa 15y agoMy understanding is that it's not so much a filter as a retransmitter layer. The LEDs give off a rather small spectrum of light that's quite harsh and the yellow "filter" takes that energy in and fluoresces out of a wide variety of wavelengths of light that are much more pleasant. There's most certainly a loss of energy because of the conversion, but it's not filtering out wavelengths like normal light filters do.
- nollidge 15y agoThis is similar to what fluorescent lights do. If you've ever broken a fluorescent bulb, you'll notice a powdery coating on the inside of the glass, which is the phosphor coating that actually absorbs the violet/ultra-violet light of the excited mercury vapor and then re-emits it as visible light.