its hard to say, I have not hit over 2lb per plant average, my first run I hit the gpw club, and have been getting around 6-7 off the 4 lights since. But I have been running kush, which is a horrible yeilder, so to get 1.5per plant with half the plant lit is great too me.
the way I look at my rooms are, my 5 plant room is really only a 3 plant room, as the 4 outside plants get stripped in half because they are only getting light from the one side, if you use that logic, my first run I almost got 3 per plant. I know if I had a differnt layout, where I could allow each plant to get light from 3 sides, the 2lb plant is fairly easy. I really need to be running 6400w per room with 600w behind the 4 outside plants, or a 4 plant 5k room. until I have each plant getting hit from 3sides at least, I am kind of using the gpw ratio over the plants yeild. I would like to be able to just weight the center plant dried to see what it gets but when Im trimming I could care less I just want to get that shit over with haha
also Im not running co2 at all which I am sure would help the yeild a lot. I have been about to dial in the system quit a bit since my first run, but that mostly has to do with training the plant to max out my lights, thinning the inside to me has helped a lot.
with my old flat garden, running 144plants on 4x8 tables, my highest yeild ever was 12lbs off of 8lights with bubba kush. I am now able to get those yeilds with 10 plants. that is priceless to me. I have 23plant total in my whole house and half of those are cuts or a ft tall in veg. that is bliss. I have been harvesting and transplanting the same day too which is amazing
I would love to get some Chemdog D or another quality yeilder in this system to see what it could do. the casey was nice, my second run of it yeilded almost 7 and they were 1/2 the size of my first run, all the buds just got bigger
I will get some pics of my 5th run up, it just turned 14day into flower