HappyHighwayman
It's all in the reflexes
I'm about an hour east of Sac, so not great for meeting bay folks. Maybe if you head out to Mike's sometime I could meet ya?
I've never used LED and have read some conflicting things about them, but I feel comfortable "knowing" they're at least good for veg. Two 315's in a 4x4 would be great as long as you can manage the heat. My guess is that each light tech has it's own strengths and weaknesses at various spectrums and the "ultimate" light would be a mix. If it were me and just because I like playing with this stuff, I'd probably have a 315 in the center with a square fixture surrounding it that has a 30-50 watt COB LED at each corner, for somewhere around 500 watts total. You generally want 50 watts per square foot, so I'm thinking a 3x3 tray in a 4x4 tent with 500 watts would be good.
How many plants of what size pots?