2.5? no, not me. I admire that!
I am closer to 1 gm/watt. I've gotten as much as a lb(454 gm) from one 400 watt but average about a gram per watt. I presently run (2) 400 watt with a 2' x 4' 4 lamp T5HO for side lighting. Total there is 1016 watts. I don't have a weight yet but I expect to see 1 gm/watt. I keep a journal but for some reason I do not write down my yield. I know how many plants and what strain. I do not trim as close as commercial and I do throw small budage in the jars. It gets selected, inspected, prepared and smoked as necessary.