The idea of running these drivers 30-65v 300mA rated is a few, they are cheap, 300mA drive current would be right where I want it to be power wise and for heat reasons, and being able to run pairs on them (which I will explain more about why it matters).
Right now I have a 2ft x 3ft flowering footprint and running 3 CXA3070 3000K AB bins @ ~1450mA each on Alpine 11 CPU cooler modules, spaced evenly along the center line of the footprint with a 24" heatsink bar on either side of those with 660nm 630nm 450nm LEDs @ ~30w total. The only problem I have with my current setup is that the light is so intense along the center of the tent that it is really a losing battle against yellowing/light bleaching directly under the COBs. Too much focused energy towards the center of the tent coupled with much less light on the sides of the tent because of the angle the light is being emitted and the distance off to the side is a bit great for 3 3070s in my experience. 6 3070s 1 per sq ft would be ideal at maybe 700mA or a hair more but I dont want to purchase twice the components (2x cost) of what I currently have to upgrade to 6 3070s.
I feel like I am better off for my goals for spreading out light intensity more evenly across the entire canopy, taking care of my issue with the intense light under the "big boy" COBs and also the issue with lack of intensity off to the sides further from the COBs which are in the center of the tent.
I was thinking to do like Mr Flux did and run 5x heatsink bars with 5 Vero 10s per bar on a single HLG-185H-C1400 running the 5 strings in parallel and the COBs in each string of 5 also in parallel I believe. Each COB would run at about 280mA theoretically but I dont really like the idea of binning and linking that many leds together on one driver.
Also a 4x heatsink bars x 6 Vero 10s per bar is a better coverage for my 2x3 ft space. Each COB would be spaced roughly 5" apart from each other and from the side walls of the tent. I would run 3 drivers per bar and would feel comfortable linking pairs of two Vero 10s in series on each driver. 12 of those spec drivers would run the 24 Veros I need for the setup evenly more or less. I am not dead set on these drivers by any means, all input is appreciated, just explaining my train of thought so far so this whole thing might make a little more sense.
Heres the layout of the 4x heatsink bars, 32" long each, 6x Vero 10 4000K per bar, 24" x 36" footprint, 4.8" on center front to back and 5.14" on center side to side, so roughly 5" on center between each COB and reflective side wall, like I said.
Instead of mycurrent setup, you can see it is far from ideal for light spread. I actually had started my LED project with 2x 3070s and then was adding the r/b bars in an 18"x30" tent so it was more ideal for that space, I just added a third COB and upgraded to the AB bins for the new tent. The lighting setup wasnt designed for the space from the start unfortunately. Heres the current layout.
The current setup is 3x CXA3070 3000K AB @ ~1450mA each and 18x 660nm 630nm 450nm
LEDs @ just over 600mA total dissipation wattage ~190w. The total dissipation wattage of 24x Vero 10 @ ~300mA each is ~187w so it should do as well if not better in my opinion being a little less efficient LEDs but MUCH better/even coverage.
Thats my theory on the situation so far. Curious to see what else you guys think.