400 watt hps YIELD

Whats the biggest yield you have got off one 400 watt hps, soil or dirt.I got 7 oz my last grow on one 400 watter.

What kind of plants and how many did you get the 7oz off?

3 plants, gods gift 10 gallon buckets. vegged to 2 ft bushes. This is why I think I can get an lb or more off 6 or seven plants.

i grew three gdp plants in an aeroponic/dwc system with a 360 watt conversion bulb and got 5 ounces off it

Ive currently got six plants in a 5x4 (x6ft tall) under a 400 watt HPS. 2 heavy duty fruity, 2 grand daddy purp, 1 purp kush, 1 pink lady. HDFs are 1.5ft tall, GDP 14-15 inches, purp kush 1ft, pink lady 8.5 inches. Started flowering 3 days ago, showing pistils already after 36 hour dark period. Thinking of adding a second 400 watter to begin rotating 3 sets of three plants 3 weeks apart into flowering. My temp and humidity are perfect, no co2, light held at 12 inches from all plants with no burn. Using a low bloom 1-4-5 fert. flushing each weeks end and slowly upping dose. What kind of yield can I expect on my first six plants I have now with just one 400 watter?? Two 400's??