Really would like to see single board heat sink for 2100mA and higher. Being 54v it does open up some driver options for series connection. I'll use the hlg240 2100 per 2 boards.
Maybe more.... I based it off of 17 to 20 par watts per sqft. If the wattage is a little higher from the driver or the eff. Is a little better....If the spread and spectrum is a little better than a COB, you could cover more space.
Docs say 1600mA max per board.
Also I don't think that driver has enough forward voltage to run 3 in series. 114v max and the board is about 110v. I'm considering running 3 in parallel for 933mA per board about 100w each to cover a 2x4.
Does anyone know if 2 boards in series and 1 board in parallel can run on a HLG-320H-C1050B at 1050mA. I looked at the 3.5A version to run 3 in parallel but the forward voltage on that model was too low.
Edit....I'm not sure forward voltage actually matters for parallel. I'll have to check.