KDOG3
Flashlight Enthusiast
Their new emitters/driver setups in the 120Lumen versions shouldn't be producing enough heat to warrant a metal head, should they? The G2Ls' would also be much more attractive with the nitrolon heads.
I don't know if this is correct - are you able to cite a reference for this?I believe that there were a few issues of overheating with first generation G2L's.
The SF P60LED module had an additional thermal regulation feature - it would throttle the output of the module down depending on how much it heated up. Upon turn- on, the output would be 80 lumens, going down to ~60 lumens after 5-10 minutes IIRC from looking at the output graph. The heat & output of that module would stabilize at that figure in an aluminum head, but would further throttle down to ~50 lumens in a nitrolon head.
My guess is that SF understood that this was a non-optimal configuration and began spec'ing the aluminum head on the G2L's.