i would assume since i can get 5oz from 1 150hps. that with 2 in the same space ,if grown scrog style, could yeild at least 10 oz but with some practice closer to 12 oz. at least if i had 2 150hps that's what i would shoot for. i always try to get the most bud i can for the resources i have available and scrog is what does it for me. i see it as if you have 300watts you should make your goal 300grams to start and if you achieve it then the skies the limit! just my 2 cents