A 1000w in a 32x32x63 tent I think would be overkill. Why would he be doing so much expanding? Am I missing something? From the setup he has proposed, it sounds like he's going to be a hobbiest grower for personal use. Adding 2 more 1000w after that? 3000 watts in that small tent would set the thing on fire. Not literally ofcourse, but at most I would go with a 600w. A 400w will do great though. I do agree with the cooltube being the best option, open air hoods make it difficult to control the heat.with that size tent your gona be doing a lot of expanding, if you were me I would buy a 1 thousand watt hps you could add 2 more after your first harvest and that test would be making you some major green , cool tubes no matter what or your throwing your money away
thats actually a good ideaI can understand that, we all have a budget. As I said the 250w will definitly give you a decent harvest. Just so you know. The 400w ipower ballast is dimmable at 50%/150w, 75%/250w and 100%/400w. So you could buy it and just set it at 75% and this way you have the extra power for a little extra boost in bloom if you want.