Hi All,

been lurking for around a month, absorbing and spending far too many billable hours on this forum. Thanks to everyone for this wealth of knowledge, i have so many subscribed threads its insane.

So i built my cab (growing area) 28.5"W 20"D 52.5"H (a home depot special) and i'm running some proactive tuning tests and lightproofing.

I'm running a 400W MH conv. bulb w/ a cooltube which is far too hot. high 80s - low 90's on 24/0 after a day or two.

my question is this:
i got an inductor fan 250CFM. should i leave one side of the light non ducted so it pulls some of the ambient air in? or should i pipe in outside air and out the cooltube and get some additional fans for the ambient air. i have 2 2" passive intakes on the bottom left and right.

not too much space to work w/ on the left


or the right


2" passive intake 1 of 2. w/ light leak


cab - i know i should take the ballast out. right?



is it 5 posts b4 i get images?

thanks everyone!

b
skidthrow Reviewed by skidthrow on . 400W MH/HPS Ventilation ?s Hi All, been lurking for around a month, absorbing and spending far too many billable hours on this forum. Thanks to everyone for this wealth of knowledge, i have so many subscribed threads its insane. So i built my cab (growing area) 28.5"W 20"D 52.5"H (a home depot special) and i'm running some proactive tuning tests and lightproofing. I'm running a 400W MH conv. bulb w/ a cooltube which is far too hot. high 80s - low 90's on 24/0 after a day or two. my question is this: i Rating: 5