GRAMS/WATTS/MONTHS
That is the basic $$$$$$
1000 grams , 1000 watts in 2 months produce 0.05 gwm
I have gotten 3.5 pounds of one 1000 watt MH bulb NO big deal it took 3.25 months.
Given the right size room and strain I would bet I could get 6 pounds, but time is not on my side.
If your doing it for fun and unlimited amount of money and time. Have fun reguardless of the cost.
Now a fool and his/her money soon shall be departed. P.T. Barnem