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led mcd compare

Posted by johnled (My Page) on
Mon, Aug 11, 08 at 13:05

Hello, please help.
I have been doing alot of research on LED technology lately and need some help figuring out the viewing angle and light intensity/mcd and how they change in relation to each other.

I want to purchase some LEDs from a manufacturer and they gave me these characteristics:

5mm LED straw or dome type. 20mA.

461.5nm 2750mcd at 62.5 viewing angle 3.07 volt
659nm 1200mcd at 66 viewing angle 2.11 volt
623nm 1580mcd at 60.5 viewing angle 2.01 volt

can somebody tell me if these are any good. i've tried to compare but there are so many, i really need some opinions on these. Thanks a lot. Really appreciate it.

Follow-Up Postings:

RE: led mcd compare

Usually the wider the viewing angle the lower the brightness
(mcd), this is of course because the light is spread over
a larger area.
Just do search like "100 5mm blue leds" on ebay and look at
some of the items... those with very high mcd ratings will
usually have very narrow viewing angles.

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