I'm thinking that may be the case and I certainly don't want to fill someone else's thread with my medicated hypothesis but I think pulling 20ounces out of a 3x3 is is tough no matter what method you use.
But at some point x amount of watts crosses the line of diminishing return not just heat build up wise but plants can only process so many photons for so long.
Idk what the magical equation is per se but if u double the watts to plant punishing levels then it seems only logical it has to give somewhere else.
Would 2 1000watt hps in a 3x3 yield twice as much as one? Not a chance imo but what do I know I can't stop bonging
Sorry tty forgot the original?
355g or 12.8ounces no where near lukios 20