mixing voltages on cob build

Alright I asked this before and got no response but hopefully someone has an opinion this time. I have 3 vero 29 3500k at 50v, 1.4a currently on an hlg-240h-c1400b. I want to add another three vero's to this but keep an even coverage of spectrum (while adding a different spectrum) around the tent. So what I was thinking was to buy a 68v vero-c at 2700k or 3000k and putting it in the middle of both fixtures surrounded by the 3500k's. That is each fixture would be 3500k@50v,~70w---2700k/3000k@68v,~95w---3500k@50v,~70w.

Was thinking the extra power output of the middle one could make up for any red light deficiencies but I'm not sure if this will lead to problems with how much heat and light intensity there is if all three are at the same height which is the current design. Any ideas on this? I'd like to use these full run veg+flower as well but I have a few months til my next grow as I just started flowering the batch I have now with supplemental blurples.

Shouldnt be a problem, and with the B version you can dim it, so I dont see any negatives with this setup. Go for it.

You can use all 5 COB's only when wired in series(4x 50v + 1x 68v) but only with a constant current driver with enough voltage, in this case at least 270v.
It's not possible with a constant voltage driver!!!
A HLG-320H-C1050(~285w net.) or
a HLG-480H-C1400(~390w net.) would match here.

Or just another hlg-240h-c1400b, since he already has one.
3 cobs on each driver.

Ya that was the plan, sorry if I was unclear. Two sets of lights each on one hlg 240h 1400.

Probably gonna order just one 3000k 90 cri 68v cob for now to test in my existing build but I'm not entirely convinced it's better than 3500k. Doing some more reading on these forums with all the posts about that in terms of ppfd.

Halfandhalf said:

Ya that was the plan, sorry if I was unclear. Two sets of lights each on one hlg 240h 1400.

Probably gonna order just one 3000k 90 cri 68v cob for now to test in my existing build but I'm not entirely convinced it's better than 3500k. Doing some more reading on these forums with all the posts about that in terms of ppfd.

Click to expand...

No need for 3.500k, IMO.
CRI90 3000k has more blue as CRI80/3000k an is also a good all-in-one spectrum and it adds a bit more red/far-red to your existing setup. Sounds like a good idea to mix spectrums and profit from both. I would still add another one to the other setup to get 6 COB's and more of the CRI90 spectrum.