Yield depends of strain and stile of growing. The gr/watt ratio depends of lamps efficiency (150HPSs or Enviros are in a different leage than 600 or 1000w HPS).

I use a good producer (NL) in SOG, without any veg, with CFLs (DuluxL 55w) and obtain about 0,35-0,4 gr/w (real watts, total consumed watts) in 2 months (about 0,2gr/w per month).
knna Reviewed by knna on . Fluoro Yield List I've got WW and NL fem seeds coming and I'm going to start five in a 5x2 room and want to know what sort of yield to expect. Just post your total lumens, how many plants, and yield. Any sort of info on the strains I picked would be helpful too, I'm a first timer but i've spent a month reading the various grow guides on the webnets. I realize that fluoro isnt ideal but given my budget/heat/electricity restricitions its my best bet thanks. Rating: 5