Factory. You can harvest bud every 30 days if
you have the right strains. Your light can be
air-cooled in a few ways. The most common way
is to mount a 4" dryer flange on the hood and
link from the hood flange to the exhaust fan
flange with a 4" dryer hose. A fan can be
mounted on the hood also.Figure 8.5 - This is a picture of a typical air-
cooled system that can be purchased in most grow
shops that sell grow lights.