I have two 3'x3.5' trays. One tray currently has two 240w 3500k Kingbright QB's and the other tray has a 600w HPS.
Ah okay I see what you’re saying. I’d probably try out all those LEDs and see how you like it!
The board only has a positive and negative molex connector and the heatsink it is connected to is anodized aluminum which is non-conductive. The driver output side (DC) is also just a positive & negative wire. If you build a frame out of conductive material and mount the driver to it then it will act as a ground.
Ah okay that makes sense, thanks!
Each QB96 will cover a 2'x2' space plus some overlap, so unless you are planning on dimming them down lower than 120watts each, I'd put them 24" apart (center to center). Personally I don't have mine on a frame, just wire hangers. I prefer that because I can move and raise/lower each one individually to find the sweet spot of each grow.
Good to know, I’ll spread them a bit further. I’ll be driving them around 160w/ea. Going to put them between my 240w QB 288’s.
I have a pair on a driver too, and I don't find it to be any issue at all with the wiring when raising and lowering. I just use solid core wire, and make it longer than I need it to be, then fold it back a bit when I need to raise the lights up. Easy peasy.