I bought the Mean Well HLG 320H-36B for just over $100...turns out it is constant on the voltage side which requires me to use all 4 connects of the cob holder for cxb3590...except for the last one. So a few extra feet of wire and some pissed off moments when I wired it as voltage through the cob. No big deal in long run because the wires will be inside a 6 inch duct for my carbon scrubber, while using heat sinks from some old servers. The copper is good at getting heat from point A to point B and the aluminum is good at heat dissipation ...the best example of this besides your car's radiator is a heat sink that goes to a laptop..some on ebay have 5 inches of 1/4" copper tube and aluminum fins on the end of it.
So now I have a 6 x CXB3590 at 3000K and 3500k along with a few Galaxyhydro 300w. I was checking out Ebay today and found a Mean Well 320 watt for $79. I kept telling myself that I already have enough light... went ahead and bought one of the thirty (free shipping). It is almost the same as the obove driver except it ends with A instead of B. (designates that the dimmer is built into the side of the unit) THIS SHIT IS ADDICTIVE.