Open will work fine for <600w. But what Pit said was vital. You might be severly limited because of space. As OT420T said cooltubes arent great reflectors, however they do have their place. A cooltube would actually be perfect for you, because your space is small and you need every inch you can get. with 10" of growing space, you would definitly have to 12/12 from seed and would need to do a good amount of lsting, but you could definitly pull it off.
Jus throwin out ideas to possibly give ya a few more options in addition to the ones my peers have given ya
dro
Jus throwin out ideas to possibly give ya a few more options in addition to the ones my peers have given ya
dro