Dale did a quad 219c and it is currently the highest-output single-cell light in existence (at least that I can recall reading about). XP-L’s give more per amp though.
Edit: I remembered wrong. Definitely not the highest-output, but it still broke 4000 lumens (and 20amps)
My X6 quad of XP-L V6 2A does 4284 lumens @11.0A tail on a SAM 25R.
My X6 triple of XP-L V6 3D does 4250 lumens @10.02A tail on a EFEST 35A.
The triple has no glass lens (not needed), 18 AWG LED wires, 20 AWG spring bypass's, FET+1, SIR800DP FET, BLF A6 firmware.
Dale and I have the same design PVC light box, and since these lights are major flooders, I suspect our #'s are over-inflated a bit (PVC light box's can get higher readings with wide spill lights). My XP-L quad and triple did a little better than Dales, but think for good reasons - I got a UCLp in the quad, no lens in the triple, don't think he used V6 bin emitters - not sure.
Seriously think'n of putting the quad up for sale - I have no use for 2 of these....
The brightest I remember from a single cell is Dales quad XPL in an ultrafire side switch doing 4400 lumens. Can’t remember what bin of xpls though, pulled 15A or so.
I’m still debating whether or not XPL or 219C, my initial thoughts are that I’ll use V6 3D’s for the X6 then use 219C’s for the blue s2+ triple
Besides this copper heatsink, what else do I need to order to make a triple? And is it just replacing the existing parts? Or does it take more? If it doesn't require machining, I'm ordering :)
#Dale's 6 in the OP here: https://budgetlightforum.com/t/-/32332, the X6 shootout - 4561 max on the best cell. V6 1A's - makes sense - our light meters will show the higest readings on coolest white tints, but of course cooler whites do look brighter - go figure...