7gal super roots air pots are 9.6 inches across. Let's say 10 to make math easy. In order to maintain a square let's go with 49 autos. 7x7 rows every pot touching.... Thats 70 inches by 70 inches. Now dinafem get big in big pots so they are going to be 18-24 inches across, each plant. So let's say 20" across plants, that's packed in scary already airflow wise, but that's 20" to each plant.... Your looking at filling a 11x11 area minimal. You need minimal 4 1000w and inverse square law to touch that, specially with how thick its going to be. Environmental control will be key, lot's of fresh clean air and air flow. Temps never leave a set difference of 10 degrees or your inviting not and fungus issues.