I go by dissipation Watts because that is what HPS growers use. It makes a direct comparison between the capability of the light technology (COB vs HPS), which is important since there can be major differences in driver efficiency and passive vs active cooled lights. GPW based on dissipation ignores the potential for power savings in terms of circulation, ventilation and AC. But that is OK because it is an issue that should be analyzed separately. When it comes down to it ,we would need to look at both gpw in dissipation Watts and gpw in total Watts to understand what is going on.
And then on top of all that is quality of the yield. There is a big difference between chem ferted hydro big bud commercial weed and connoisseur organic sticky OG clackamas coot nuggets like these from
@Bueno Time. In my view, the only way to get over 1gpw with nugs like these is with DIY LED.
