i just purchased 2 400 watt lights. 1 hps 1 mh...how big of a box should i build??? i plan on doing sog, so i will have 2 compartments to grow box, the left side with hps/mh for veg and flowering, the right for germination,clones lite by cfls...so how big can i build this for 400 watts?
I'm running a 4x4x7H box with a 400w. Works good. http://forum.grasscity.com/grow-room-design-setup/298624-my-new-grow-chamber.html The 400w HPS fits this room perfect AND I didnt have to rip any plywood!
A 400w HPS is good for 4-8 flowering plants. The 400w MH you got is probably overkill for a veg room for a sog operation to supply a 400w flower room, but certainly not a problem to use.
that's funny i got the exact same size box, but with an aircooled 1000W....with a 400cfm exhaust fan and duct booster fan for the light, its good.... but knowing what i kno now i would have made it a 6by6 so i can actually walk around....