the whole HPS set up is kinda pricey tho. . .

also i have a random question about temp. and venting. Do the plants need constant air flow (does a fan always need to be on) or is that only durring flowering? My buddy is using a closet with no vent, he hase a fan but doesnt know how often to turn it on. he is in the veg. state right now and doesn't know how to aproach the air temp/humidity in the closet. he says it doesn't get to hot in the closet since he is only using Flo's right now. he only turns the Crystal bulb on when he is hame with the door open. What should I tell him to do?