I would say to aim for an oz. per plant, that's what I'm aiming for and I got a whole master bedroom for my 16 plants, mine are in a room 8 by 8 and under a Lumatek 600 watt digital ballast with HPS bulb. The plants are in a 6 by 6 area, I got the whole works in my room, intake and exhaust and circulation fans, air cooled lights the whole 9 yards. Like I said I'm hoping for and ounce off of each of my 3 Platinum Kush clones, 9 Purple Kush clones, 1 Banana Kush clone, and 3 plants grown from seeds I pulled out of bomb ass chronic. I will be very happy with an oz. per plant, anything more than that would just be a blessing for me. An oz. of dried and cured buds of coarse.