My best result from the 600 was 400g. Bare bulb, 8 plants from seed, vegged 8 weeks flowered in a vertical doughnut for 12 weeks.
Every room has it's own issues and strain selection makes a big difference with yield. A 7 or 8 week strain will increase your yearly yield compared to a 12 weeker. I retired the 600 after 14 years and I've switched to led.
I'm running 2x 315w CMH in 2.5' x 5', with an organic soil bed. It's my first round in this set up and I'm only 3wk in, but I think I'll probably be in the 15-18oz range off 3 random seed plants.
I think with the right clone run, 2# is perhaps not unrealistic. Even without Co2.
Before flower - then 3wks into flower.
Bunch of fake ass neo-capitalists masquerading as counter culture cannabis enthusiasts with their thinly veiled
self-justifications catering to the morally
ambiguous for the sake of the
ALL MIGHTY DOLLAR