Adam Seychell wrote: > I just realized potential confusion about LED angle specifications. Is > "20 degree" LED a 20 degree from centre (or +-20 degree) or the total > conical span (+-10 degree) ? Usually it means +/-10deg between 3dB points. The LEDs on ebay commonly show the radiation polar plot. > In any case a 8 degree LED will have much higher mcd rating than 20 > degree due to the difference in light concentration.
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Re: [Homebrew_PCBs] Re: Small Quntities of Dry Film Resist (UV LEDs)
2008-01-28 by Russell Shaw