I'll be doing Arjian's Haze #3 scrog style with a 400 watt hps. Any ideas as to the size of the cabinet?

I can get 5 feet in height. Also should i disregard thermal imaging since i will be using a cool tube and venting back into the house.
anonyanonyanony Reviewed by anonyanonyanony on . PlywChood cab or blackout sheeting? I was wondering. Should i go to all the hassle of building a cab from plywood or should i just build a 3x2 frame setup and staple white sheeting to it? If the latter then what are the disadvantages of doing it this way. It will be in the attic. Tanks. Rating: 5