Save the heat, you do not have enough room to use HID lights unless you buy a cool tube and a vortex blower to keep the heat away.

If it were me I would use 48? florescent lights but relocate the ballast outside the grow box, again to save the heat. You could use one of the 125w compact fluorescent lights too. Line the box with Mylar to maximize the light reflection. You will need fresh air in and internal air movement inside the box. What about odor control?
Zandor Reviewed by Zandor on . Expert Grower input wanted Ok im planning on growing for the 1st time. Im building a grow box about 4feet high,4feet wide,2feet deep. so my questions are 1. Which is a good lamp to use? 2. which plant can i grow in the box? i dont want them to grow over 3feet any higher i think the lamp would burn them. Rating: 5