What led are you going with? Using them with lec?
I'm using LEC, aka 315W CMH kits using Philips digital LFSW ballasts in my prebloom veg.
I've been using LEC, aka 860W CDM Allstart lamps on magnetic ballasts, for years in bloom. It's these I'm replacing with LED modules. Keep in mind that it's the low frequency square wave ballast technology that allows this lamp technology to run at high efficiency. On standard mags, they suck!
The modules consist of a Meanwell HLG 185H C700B driving 4 Cree CXB3590 3500K CD BIN 72V chips at 54W each. Capping the dimming wires lets the driver run at 108%, or 216W/4=54W apiece. The driver itself needs about 8W, for a Kill-a-watt verified total draw from the wall of 225W.
I have 80 degree glass lenses on every COB, for protection and to tighten the light distribution pattern. This combo is good for 824 PPfD over 6 square feet.
Two of these modules absolutely mops the floor with the Mars Hydro 1600 on its veg setting, pulling an actual 550W. The Mars unit is easily the warmest LED fixture I've ever operated, heating up my small veg zone by easily 5 degrees all by itself.
By comparison, my modules do not contribute heat to the grow space at all. I realize this is an eyebrow raising claim; all I can share is that everyone who's seen them will verify every word I've said to be the absolute truth.
How the fuck else could I be the only one I know who can run 24 of these modules, pulling an actual 5400W, in a 6' wide x 12' long x 8' tall box and have real trouble keeping it WARM ENOUGH?
