I've gotten 2 oz.+ per plant with a 400 watt hps in a 3x3 space, it all depends bro....there are so many variables........how many plants will you put in that area?The more plants squished in there, then smaller yield per plant, or you can grow two big plants that each yield like 300 grams each....so yes is the short answer you are looking for..........but you need to make sure all things are in place besides lighting...temp...air flow...etc......