I've been trying to determine what the best lamp setup would be for four plants in an enclosed grow box no bigger than 3'x3'x6'. I'm planning on using intake/exaust and oscilating fans to keep my lamp cool. Should I use 400w mh for four plants in an enclosed grower? What would the best light setup be for this type of grower? Any help will be appreciated I'm also making a carbon filter system so if anyone has any good exaust filter setups then I would also appreciate help on that..