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Old 11-15-07, 07:15 PM
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Chris_F
World's slowest cyclist.
 
Join Date: Oct 2007
Location: Londonderry, NH
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Originally Posted by jeff-o
Yep. Though the instructions I mentioned before used a cyan LED emitter, so it's pure light in one narrow spectrum.
I've heard there's greater lumen/watt potential from colored LEDs than from white, which makes sense since white LEDs are basically UV LEDs covered in phosphorus, so I'm sure there's more loss there. So, I can see why a colored LED would be attractive. But why would they pick cyan? Sure the eye is sensitive to it, but all the "stuff" you'd want to see from a bike isn't cyan colored. It's yellow lines on the road and tan colored sand, or tan colored rock, dirt, leaves, etc off road. I'd think a yellow LED would be better just because it'll catch more "stuff" that'll reflect more of it.

If colored LEDs do get more lumens/watt then it'd be nice to see a light with a red, green, cyan light. May not get nearly "white" light out of it (since the color is so narrow in spectrum) but it'd do a decent job.
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