For anyone interested, I have pics of a 219C “Monster Flooder” (well, perhaps a bit shy of “monster level”) posted here. 4 x 219C’s at approximately 2.0A each (tested in my DIY sphere at +/- 2,100 lumens). I’ve considered buying another BT40S bike light and swapping in XP-L’s to get more lumens and compare.
-Garry