Ok, looks like I’m out of likes for the night sorry.
I’m guessing there is a fan wired to each driver then? And then a group of leds on each as well?
If you want dual purpose probably looking at 3000k 90cri or maybe 3500k 80cri. Blue wavelength intensity is about the same in both. The 90 cri has a little lower efficacy, but it peaks quite a bit deeper in the reds and provides a decent amount even in far reds. You don’t really get that in the 80cri models. I like the 90 cri. Most are seeing about same harvest results but getting a little emmerson effect with them leading to a little quicker time to harvest. With available voltage, we could probably even do some mixing of color temps too.
The main reason I asked if you were solid on the cree was due to cost. The 72 volt cob is out of the question as one doesn’t meet minimum driver voltage, and two is beyond the driver max. The 36 volt cob we can fit a few, but at 700ma drive current is gonna be like 25 Watts a cob. At $40 each that’s pretty steep!
As far as getting the most for your money, in a 36 volt cob @Bogleg just pretty much stole some gen 5 citizen 1212’s from cobkits. You’re still gonna be in that 25 watt per cob mark, but I think cobs cost him like $9 each. They also have a few different bigger voltage cobs. I’d have to go check fv at that current for fitment, but I’m sure we can make at least one of them work. They’re $20-$40 range, but you’ll be looking at more of a 35-40 watt cob.
Bridgelux has a whole gang of products at your disposal in the vero line. If you’re looking at lower power like the citi 1212, the vero 18 is about there cost and performance. They also have the vero 29 in 52 volts and 69 volts, for around $30 each. If you’re looking to push some power this may be your best bet.
Luminous is a relatively newer name in horticulture, but they’re suppose to be up there with the big boys efficiency wise, and I think the cxm 22 is a 52 volt cob as well. I haven’t built with them yet, so I’m not as familiar with the specs sorry. But I think they’re around $20 or so and looked at as another one of the best bang for your buck options.
Worst case scenario, you can shove a different driver in there and go with a cree build that makes sense if you want. It will obviously cost more, but I’ll help you get the parts together for whatever you want.
Did you have an expectation of how much power you wanted?