Well I've vegged quite a few plants with CFL and then flowered with HPS. Let's just say I'm disappointed with less than 3 oz a piece. But I do grow them to 4-5 feet tall. I've been cramming six 5-foot-tall plants under one 400 watt HPS and pulling over 4 oz off of some of them. A lot depends on the strain and health of the plant but I've recently added a 600 watter to the 400 watt so now I'm hoping for more than 4 oz off every plant.
