I agree with ZOMBIES although if you are having any sort of expectation of yield from these lights will probably not suffice for flower, personally I would go HID all the way preferably 600W if you can (obviously 1000W would be best but I am assuming in your position this is not an option) but 400W will work as well for flower. you can get away with T5's and have a healthy good looking plants out of your vegetative cycle but coming into flower things might become problematic for you. the OH T5's will work but will not give you anything above a mediocre yield.