I can say I got just under a gpw on my first casey run. that being said I had 4000w, with 5 plants. 4 out of 5 plants only got light from 2 sides, so lets say together, we are talking about 3 full plants. If you do that I got over 2lbs per plant, without C02, my first run.
The more plants getting 3-4 lights hitting it the higher your yeilds get. If I was able to run my two rooms together I would get a better yeild than the two rooms split, because I would be able to light more plants from a 3rd side
DD is running a sealed room, he has a ton of runs under his belt, and his strain is a fucking monster. I remember some of his pics with a wine bottle getting dwarf by a kola. I have no doubt he can get 4lb plants with ease, I probably wouldnt believe it if I did run the system myself.
This system, grows plants, bigger and faster than you could ever imagen, it blows my mind.
if you could see the way a plant grows that is getting hit by 4000w, the noding, the branching, its truly incredible