Nice spot, jebba.

It looks like there may be an entirely different setting for the LEDs when used as a flash (up to 320 mA, so about 3.7V*0.32A=1.18W for up to half a second) versus when operated in torch mode (0.185W, same ballpark as estimated before). So, they would be overdriven briefly for the flash but operated at a safe level in torch mode. jakiman, can your setup measure light delivered in a short pulse? I'm curious what the actual flash output compared to the continuous mode output is.

>1W out of these LEDs would definitely be burnout territory...not to mention the battery drain! The question is, what is the actual drive current for each mode (those variables seem to be safety limits)?