Then change your strain to one that matures faster. Make sure you never veg in your bloom room. Count only the time and wattage in that room. You could add up all the final weights over a years worth of harvests. Then divide that by 12 to get your gpw every 30 days. Its all about efficiency and changing variables to increase that efficiency. Wattage of flowering light and time it takes to get them flowers ars really the only two constants to measure by that makes any sense. Whether you veg out just a few bushes and a buddy has whole flats of just rooted clones with only a few days veg time does not and should not matter. What matters is whats going on under them flowering lights over so many days. Measured up against your weight in grams. I totally get what jorge was saying.years ago. Watts and time.