>> Certainly sounds high for a T1 3/4 LED - if that is what you are 
>> using - at
>> 100% duty cycle. I have always worked on 20mA at 100% duty cycle.

Yeah, and some of those chinese knock-off LEDs have very "optimistic"
ratings. There were some studies over in candlepower forums that showed
some of the no-name white LEDs having drastically shortened lifetimes
(brightness-wise) when overdriven (compared to, say, nichia LEDs with
the same nominal ratings.)  I've had some LEDs fail in the way described
here, especially UV and white.  The interesting thing to me is that the
LED seems to continue to work as a diode with similar voltage drop; you
just stop getting light out of it.  (eg one in series string of LEDs
will go "dark" while the remaining LEDs stay lit at the same brightness
as before the failure.)

BillW
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