I'm sure genetics play a big role in these huge gpw numbers. I pulled 13oz off a 2x2 under a 315w. But the other 3 seeds didn't do as well. I could see that over a 4x4 pulling 3#. Of course this was the only one I didn't make a clone of cause it looked the crappiest going into flower. Strain was dark star kush. I've grown it once before under a 600w HPS and only got 8oz over a 2x2. CMH and LED all the way.
This is without co2, 4200k spectrum so I believe these 3-4+gpw. I did lose about 2.5oz of that to budrot. When I run it again I'll scrog more to decrease the bud size and hopefully avoid the bud rot.
I'm interested to see what tips you can share.
Haven't read every post here, but I skimmed over the 600 posts. Nice thread. Beautiful plants. Great genetics.