Howdy all. I signed up for this website today, compliments of a Google search for Cree LED module grow lights. Have a small grow for several years now (legal in MI), and due to odor control issues have been trying somewhat unique lights requiring no AC. Currently running a 400W magnetic induction 3000K spectrum with just ok results. Started supplementing with a 32 watt LED panel (red/blue/white) a guy made for me, and saw some improvement. I am applying super-cropping/lollipopping techniques to keep the plants short, and the canopy in the same plane as much as possible.
But still too much heat to run more than one 400W light in my 6" x 10' flower tent, so just built a test light with (2) Cree 3070 COB modules. I bought the LMD 800 drivers from Cree as well, but I wish I had found this post sooner, then I would of found the less expensive drivers you suggested. I also would of splurged for more COB modules. My plan is to eliminate the 400W magnetic induction in favor of an all LED setup.
A twist to the story... the guy who made the 32W LED panel for me asked me to design an extruded aluminum housing with built-in heat-sink fins for a bar style illuminator, to go with the LED circuit boards he produces. He said he could sell 100's. Well after I designed it, spent the $$ to make the tooling, ran extrusions, and made prototypes for him - never heard from him again. Fast forward a couple years, and now there are these high power COB modules from Cree that don't require a guy to make any special circuit boards and LEDs - sweet!
So maybe there are some folks out there who would be interested in some of these nice extruded housings. The original design has the pocket too deep in the housing, as the best design (as already noted in the original post) is to run without lenses, using the natural cone angle of the COB module: 115 degrees to make a nice with splash of light even just 8-12" above the plant canopy, thus maximizing the light energy to the plants (for them awesome buds we all desire). So I went with a spacer setup- a 1/8" thick aluminum plate with (4) aluminum standoffs to set the right height. The spacer and standoffs are mounted using thermal adhesive, so the heat dispersion is passed through to the entire heat-sink housing. I attached a couple pics, sorry I am not an electrician, so the wiring is kind of ugly. But the light is very functional.
If you don't want to build your own light I can do it for you.