Hello, Im new to this. I currently have a grow cabnit that is 2'L by 2'w and 4'H. It has two 4inch fans one exhaust on intake. I currently have 5 cfl bulbs and want to upgrade to a hps light. Would a 400watt be to much or should i get a 250?
I would think that with a good bit of ventaltion you will be allright. The 400 will give a great yield but make sure you gat at least 1 6" vent fan and maybe another to move some clean cool air in...
