Grow room in basement Midwest. Super noob. Vero COB and spacing.

Hey everyone. I really tried to not create a thread and do my own research before posting but I'm getting lost and need your help.

Environment
Grow will be in basement. Ceiling is 6 feet tall. Room temperature hovers between 63-70 Fahrenheit. Setup will be RDWC system using Hydroton and GH nutes.

Intentions
Trying to avoid buying on Amazon pre-made COBs but have NO clue on lights. Spent many hours researching only to be even more lost. I come to the realization that I should just stick to the Vero 29 B/C 3500K 80 CRI cobs. I was thinking of putting each COB over each bucket container. 6 x COBs. Is this too little lighting? Should I go with 9 COB leds instead?

Requirements
- Ability to adjust height of light per bucket container. Don't think I need dimmers as I plan on under driving the lights.
- Future expansion if I decide to add more buckets.

Questions
- Is the spacing appropriate for scrogging in the RDWC?
- If I stick with Vero 29 COBs, what parts do I need? Super clueless. I know that ideally I want passive drivers so under driven. Is there such a thing as 60W Vero 29 that is passive cooling? What parts/drivers do I need to accomplish that? I am wanting reflector lens too.
- How do you suggest I hang the lighting considering I have 6 ft. ceiling?

Welcome, snap.
Because of the low ceiling height, I'd look at using Quantum boards or light strips. The biggest advantage is spreading out the output over a bigger area. www.ledgardener.com has some great info on how to build fixtures. Your layout looks workable-something about a 5x5 in size would need approx. 500w of power to give you good intensity with efficient diodes.

6ft is plenty of room to work with. Check out methods like LST, and SCROG. Flatten out that canopy to get the maximum use out of that light.