Bullzeyebill
Flashaholic
Yeah the RCR123 cells do over-drive the LEDs, but yours is the first case I have read of them severely over-driving them:thinking:. Many members use their A2s like me with RCR123 cells, with no ill-effects.
I think there is a way to change SMT resistors and mod the LED ring to drive the Nichias at a lower current. But, I think primaries work best in the A2 for the added run time (3 times as long as RCR123).
I wonder if using cheaper non-IMR cells like mine will help?
It would be interesting to see if our results will be the same swapping our lamps... I'm willing to bet its your white LEDs giving you a ~10L boost.
The red LEDs each have a 100ohm resistor, more than enough to protect the LEDs with the over current of the RCR's. They do end up brighter than on two CR123's, but I think that they handle the over voltage better than the white's which have fairly low resistors; can't remember the ohm rating. The whites certainly add the 10 lumens.
During the lightmeter benchmark passaround years ago, one of the passaround lights was McGizmo's A2 with the LED ring removed, and we tested the lights for lux with our various lightmeters. Later all the the lights were tested in an IS by a reputed lab, and the A2, at the time tested at 68 lumens without the LED ring. Batteries were all primary cells. Re the A2, a fresh bulb might have tested higher.
Bill
correction made re lumen output of A2
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