I just set up a grow room. It is 5ft long and 3ft wide. I have a T5 4ft 8 bulb light. Supposedly 40,000 lumens. The guy at the shop told me it would effectively light an area six inches larger that the actuall light giving me my measurements. First of all I want to make sure that it is not too big of an area.
Secondly I am going to run a four inch in line fan for an exhaust. My question is if I am running a low heat light will I need to run the exhaust full time? If not then how much? Also should I just put a hole in to let fresh air in or should I pump it in with another fan? If I can just put a hole in is there some kind of leuver set up that will open when the exhust is sucking out but not let air out when the fan is off?
Thirdly with this light how tall should I let my plants get before I force them to flower?
Secondly I am going to run a four inch in line fan for an exhaust. My question is if I am running a low heat light will I need to run the exhaust full time? If not then how much? Also should I just put a hole in to let fresh air in or should I pump it in with another fan? If I can just put a hole in is there some kind of leuver set up that will open when the exhust is sucking out but not let air out when the fan is off?
Thirdly with this light how tall should I let my plants get before I force them to flower?