1 gram per Watt is the avg. If you have a 1000 Watt hps, you should get 1000 DRIED grams of fruit. The most I ever "heard" about was 1.44 grams per Watt and that was with hydro clones (about 20 inches tall). People that do soil bushes, they can get far more than the gram per watt. A gram per watt is a little above par!