yeah you could eather build a box , or buy a box , but if you dont really have alot of money , like me lol , then you could build one , i got a box that only holds one plant , but i plan on growing outdoor and getting some clones , but depending on how many plants you plan to grow and how high you want them , then just build a box that you think will suit your plants but you have to have enuff room for them to grow , for now tho you dont need anything high'r then 3 or 4 feet , even 2 , or even if you have an old computer you can actually make a PC grow box , i have one , i havent used it but ive seen some insane plants growing in one , just search for PC Grow Box , but your probably lookin for somthin that will fit those lights , so id say build a box about 3 feet wide , 3 or 4 feet tall , how ever tall you can get it , line it with Mylar metal , put a fan for in-take and a fan for out-take so you can have cool air running through it , so one fan to blow in the box and one fan to blow the air out of the box , hook your lights up and your fans to a timer and your good to go , you can get timers from anywhere to 10 , to 50 bucks , they are pretty cheap tho lol but they work great