Is a 400W too big...

for a space that is 36"x20"x64"?

Not if you cool it but that is a small ass space probably better off with a 250

just have good ventilation is all, the space is fine. i started with a 400 hps and a closet that size, i got 6 zips off 4 plants after killing the other six!! damn that was along time ago!! hahaha

good air movement is gonna be your corner stone of your grow

I'm currently running a 400W MH for vegging and soon to be a 400W HPS for flowering, in a closet that measures 19" x 25" x 48" , have a cold air intake runing 18/6 with the light as well as a 250 cfm exhaust fan that runs 24hours a day, my average temps with the light on are ~76f with ~45RH , and light off ~70 with ~55RH, Check out my journal I've got some pictures of the grow area, I believe the ones that are in there currently the old configuration, I've recently (within the last week) remodeled it kind of moving all the ducting out of plain sight, I will take pictures tomorrow night when my wife gets back home with my camera, Hope any of that could help

Thanks for all the advice everyone I appreciate it....

So it seems like you all think its a good idea to not go cheap with the cooling.

I was going to get a cooled ballest, but would a 160cfm inline fan cool a bulb in a 400W?

I would of course have additional fan at the top blowing through a carbon filter, what size fan do you all suggest?

Oh and what is a zip?

hornyantilope said:

Thanks for all the advice everyone I appreciate it....

So it seems like you all think its a good idea to not go cheap with the cooling.

I was going to get a cooled ballest, but would a 160cfm inline fan cool a bulb in a 400W?

I would of course have additional fan at the top blowing through a carbon filter, what size fan do you all suggest?

Oh and what is a zip?

Click to expand...

A Zip is an Onion. (AKA Oz)

thankz!! full on OZ!!! when all i could afford, it worked enough, when you get more money, go for like 200+. i useed one of the cheap inlines from home depot on a 1000w hps air cool, managed to keep my temo down below 79. that was in a 4x4x8.