Christopher Zguris wrote:
>
> As part of a PIC-based flasher project, I'm looking for high-brightness LEDs
> in the 5000-7000 mcd range. Digi-Key and Mouser have 1640-2000 mcd, and
> Jameco has a 7000 mcd, but I'm looking for sources in addition to Jameco
> (cheaper, better, etc.). Quantities of around 100, at the moment. Any
 thoughts?
>
....


Currently, the very highest brightness red LEDs are made by Mitsubishi
Cable (800 262 6200), however, very good ones are offered by Marktech
(Toshiba, 518 786 6591), Sharp (800 642 0261), Siemens Opto (408 777
4968), Stanley (, and others.  Note that the brightness spec depends
strongly on coverage angle.  The easiest way to achieve a very high
brightness spec is to narrow the angle by means of a longer focal
length: brightness varies with the inverse square of coverage angle.
That's one reason why the jumbo packages achieve higher brightness: they
maintain low f# even with a longer FL.

Since you mention Digikey, I assume you're in USA, and the above are the
USA phone #s:


--

Paul Mathews, consulting engineer
AEngineering Co.
optoeng@whidbey.com
non-contact sensing and optoelectronics specialists