personally theres alot of factors?? Experience, how much your room is dialed in how long you vegged temps and most importantly the Feeding i grow useing 1 k lights and pull 1160 i do sea of green and yield a solid 1160 dry grms per 1000 watt area thats vegging 2 weeks Veg i have started little tweeking going 3 weeks now takin clones first week of veg , supercropping every feeding one shot of C02 per week in veg 2 shots in flowerin per week fedding schedules in veg first watering 650 ppm 2nd 1000 ppm 3rd 1000 ppm flowering week 1 1000 ppm 2nd 1150 3rd 1150 4th zinc and iron foilage 5th 1200 ppm 7th 1350 8th 500 ppm and done my goal is to achieve 1362 dry grams per 1000 watt area i Hope