I am confused on this gpw thing...I mean is that for the whole grow, or per plant? Does it matter how long you veg, because that makes a big difference on the yield...so do you count all the plants flowered at the time with the light, or is the gpw per plant...I get 3 oz per plant if I do 4 plants...and total is 330 something...I use a 400w so if we measure the whole grow I am going awesome...but if it is per plant then I am doing kinda bad...lol
i do not like the gram per watt because number of plant's, veg time, watts use on fans ac, dose not count
you could do a grow and get 1-2g per watt easy in short time sog 100 plants under 600w 18" above the plants (large canopy)
ac room to 24c, canopy 27
and a high yielding strain grown in a Aroflo hydro system
and some one else grow 1 plant in soil under a 600w hps may get 0.5g per watt