i have a 10 x10 x7high iuse a 1000w hps 155,000 lumens hortalux bulb,i veg with 4ft flos.i do 12 to 15 at a time have buds from 1/4 to 3/4 oz each nuff for me.the pot behind the bud is 3.5 litter,buds are only just starting 5th week flowering,will post later pics so you can see progress.