Convoy C8 with C8TT head, CUTE-4-SS optics,4x Luxeon V 4000K, 24Amp LD-B4 driver and subZero FET switch:
Ceiling bounce lux shows similar numbers to C8 with anna optics and 6x LH351D 90CRI, so it should be around 6000-6500lm,battery cell was VTC5A.
Tint is great, no green,beam is very smooth without coronas, only SS bezel creates some artifacts.
Despite the large fins, head still heats up very quickly because of large power (~100Watts with fresh battery).
But it cools down considerably faster than C8 with alu spacer and similar total weight.
I'm sure at more sane power levels (~10Amps) this head would be more beneficial, 100Watts is just too much for this size (except for short bursts) without active cooling.
With battery voltage of 3.8V (nearly 50% discharged) current on high was still pretty good, around 19Amps, thanks to the very low Vf of Luxeon V.
More info about head:
https://budgetlightforum.com/t/-/38581
https://budgetlightforum.com/t/-/50427