The most thorough all in one place teardown is Lexel’s Review I’ve not seen too much else on here, but there seemed to be some stuff going on over at the German site. Someone fixed the uneven brightness levels during low by swapping in a TA driver with narsil and there’s a demo video of the light ramping.
Also I don’t think it started since I’ve had it, just never noticed, but in the lowest mode I can see that one bank is ever so slightly brighter than the others. Once the light has warmed up they all seem to even out. I did not shine the light into my eyes or anything, just ran it on turbo outside of my vision until I felt heat then went back to low and they were even.
And JasonWW:
The Xp-G3s can easily do 1000+ lumens each as long as the current is there to be supplied. The light would be pulling 60+ amps, but with 4x 20amp high discharge cells that can be supplied to get this thing cooking at 20,000 lumens 