[EDIT: I went off on a tangent after misinterpreting the question. Dunno what the fuss is... perhaps it's got a great colour rating and therefore useful in audio/visual or have you seen grower's fussing over it]
Would defs look at QB type tech. if you're looking at investing in LEDs. The spread and thermal management, primarily, are way more attractive, and the efficiency depending on drive currents.
For COBs: Veros or Citizens are the better choices with Cree being a little on the expenny side. The more COBs you can pack in, the better, in order to have better spread and lower hanging heights (debatable benefits for hanging heights) and run lower drive currents to improve efficiency, practically becomes a little too expensive. Veros are where I've researched most. Commonly peeps run either the C or D type COBs at 1700mA and 2100mA respectively, which will net you 118W and 81W respectively.
Go 80 CRI for the increased photon count, sadly we don't have PPF data but can use the lm/W as reference at least. You'll see, the disparity on 80 vs 90 CRI.
If you're looking for a veg light, you get the rather sweet bonus of an increased photon count (again ref. lm/W) with the cooler kelvin rating as the COBs have less coating to augment spectrum and therefore more light comes through at the same wattage compared to a warmer rating.
https://www.bridgelux.com/sites/default/files/resource_media/DS93%20Vero%2029%20Array%20Data%20Sheet%20Rev%20A%2020160622.pdf
JustinHemp420[/member] can perhaps help us out and weigh in on more data, or practical use of COB vs QB as he's running both.
Eeeeehhhhh Whatever he said [emoji121][emoji121][emoji121]
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