All 4 QB's are
HLG 288's , 2 Rspec & 2 Bspec . Boards rated 54vdc , 2800ma .
One driver is an Invertronics EUM240S350DT output 35 - 111v , 3.5A , P 240W
Other driver is a Meanwell XLG-240-M-AB output 90 - 171v , 2.1A in CC mode , P 239.4W
Meanwell is a CC/CV , AC/DC output type . I am waiting for
HLG to get back with me , but I don't see any conflicts . Parallel I get as you don't even want to mix boards of different batches but in series with same ratings & both boards getting same current seems doable .
Gonna use 2 drivers , 2 boards per & each mounted on triple size heatsinks to increase spread . Was thinking 1 R & 1 Bspec each again for spread .
HLG in their blog shows them testing QB 288's with added blue & red both & individually . It would also allow me to use what's on hand w/o having to spend & give sufficent light w/o center hotspot in a 3X3 running say 50 - 75% full load .