It's a fact you cant deny. Everyone quotes HPS watts of the bulb but wants to know how much those leds are pulling from the wall. They never ask themselves what their lights are pulling from the wall while they're questioning the other lights
In your case I would get something more capable that Cree CXB3590 for what you're doing. You could get your 1000W DE that is actually burning 1250W or so down to 750W-800W with COBs. I would go for the higher power Citizen chips that can handle up to 500W and run them at about 150W with decent...
You've been running 600W HPS in that tent with sativas so far and had no issues? If I were you, I wouldn't change anything. And that's coming from a born LED guy.
Since I dry trim I do it over a 180u screen and sift the trim pretty well which gives me pretty good quality dry sift and can smoke it just as good as trimmed bud. What's left from the trim i jarr and collect it then wash it later with ethanol. Quich 2-3min shake will dilute leftower resin and...
I got max of 145W of lm561c over 2x2.5' and it's overkill. Altho I only have 2.5' height. I run those at 90W max. That's 18W per sqr'. And that's 576 chips in there. Running it at full blast plant's will get too compact and too stressed by the light by the time they hit 1'
Edit: that's for veg
Guys please start using some L channels on thosd 800+ boards. You're hanging them by the edges and let them bend downwards in the middle where those copper lines are being under stretch. With an L channel or two, along the length of the board, rigidity is added and stress on solder points/copper...