I see, each 4x4 will have 9 cobs in a 3x3. That's 450watts of LED per light at 1400ma. So one hlg185 will run 4 of those and and hlg240 will run 5 cobs at 1400ma. The combo of the 2 drivers will give you your 9 cob grid, but it ain't no 650w.
i thought the cxb3590 can pull 75w each? i basically want a 1000w hps replacement. what would be a good setup i like the 3x3 or i can do 4x4 but prices go way up as i need 7 additional heatsinks with a 4x4 cob set up. im trying to go price out whats good pricing on making a cob setup spaced evenly.