You don't have a lot of height to work with, you might be better off with many CFL like BobBong has used and Harddon has used to good success. Save the heat in a space that small and focuse on other issues of growing and not deal with the heat.
Zandor Reviewed by Zandor on . Mh lighting question? my buddy and I are gonna be growing about 4-5 plants in an area about 5 feet by 4 feet and around 6 feet tall. we were wondering if this 400w mh lamp would be good for us? http://www.bghydro.com/BGH/customkititems.asp?kc=HLMH04SM&eq= Thanks! Rating: 5