currently use 2 1000w hps in a 4x8 space. I do use co2 last 5wks of 8-9wk kush. The electric company doesnt make it easy on the pocket so id really like to switch to LED...Ive put it off for 15yrs now... figured id get brave enough to transition... i take 8 to10 in preferably with 4 to 5 node...