Hey Chongman,

I have a 6" Suncort duct fan sucking air across the light and pushing it out the left side of the box, which is always on when the light is. I also have an active input/output vent system I run to maintain the environment in the box.. Currently running at 72-78 deg, 50-70% humidity, with the box sitting in a garage getting into the low 30s.

You building something similar?

Peace, Farmer Rich