Hi, oh man... In all respect 4oz on a three gallon pot in standard to a well rounded grow room. That being said, I have a good environment control, my feed dialed in but most importantly- your VEG. How many times do I see people veg 20-50 plants under 1 1000HPS. Fuck, I just cannot get over it! When I grow in air cooled shades I tend to keep my plants smaller and run 9 plants a 1000 Watt light. My plants are in 2 gallon pots with sunshine mix #4. I tend to average 2.2oz a plant; that's with three weeks veg from clone. Sounds crazy, I get that off Kush too.
When I flower under open reflectors I run about 23-25 plants in 2 or three gallon pots under 2 1000HPS and 2 600HPS in one flower room. (this was past set up) I got pics ill post to show u over 4oz a plant meaning over 5LB on 3200 watts
. Thats 5 rows of 5 plants under 3200Watts = 5lb plus. And when I did it in rooms like that (flip flop) the temps were not that controlled and heat was usually an issue. So, not sure what u get but u should be able to hit it...
Hers some photos.! Just a few. I also have a post on General Marijuana grow under 'Post some new pics, feel free to ask any questions'. That is of my new set up.