It really all depends on your budget. What are your ideas? Are you going to use the whole room to flower in or are you going to seperate it on veg and one flower area? You really need to read the grow FAQs and a Few journals. There are several people growing in that size of room. From what I have read you can put 2-3 1K watters in there and pull several pounds. Read more to get a better idea. Take someones setup that you like and duplicate it. If you PM most people will respond and a willing the help anyone new to the hobby. I hope I helped.
KM