Hid

Will someone please elaborate on heat issues comparing 150 hps to 400 hps in 5X5X5.5 space?

Have 150 hps and wanting to upgrade to 400 hps.

3 computer fans for intake and outtake.

Number of plants for 250 versus 400 that can be finished?

Thanks a million.

You should be fine man. When it was 90-100 last summer all I had was a 400 watt MH for vegging, and all I had was my AC connected to the box via a 4 inch duct and a single CPU fan for exhaust. I would say you're fine, if for some reason you aren't then it's nothing a few fans or an AC can't fix