I just recently purchased a 400 watt hps/mh switchable yield master with the glass cover. It has air cooling for the light and I was wondering what type of cfm fans should i get for intake and exhaust to get rid of the heat?
Hey dude, I got a switchable 400/600w ballast, and I use a 6 inch vortex fan. I think it is like 447 cfm or something, it works well. I'm not sure what the cfm/watt ratio is, but it keeps the glass cool enough to touch.
