well shake is right,infact i would do much more than read these forums.theres a video on the good old you tube that i watch from time 2 time just for s and g's but its verry informative,type in i grow chronic"u want the video with the guy painted all green. now first and formost, you have more than enough space for your bidding,when it come 2 lighting if you want the best performance your going to want the 1000 watters,personally i use 600's but i have experince and make it work,if you put a plant grown under a 400 watt and a plant grown under a 1000 watts of light you will see that the 1000 watter as many more shoots,bigger stock,many more flowering sites.if you have the cash try and find a system that is switchable from mh to hps "trust me if a ballast fails in your veg room you can snag one from your flowering room or vice versa it save you a lot of would be problems" the second thing to consider is how your going to keep your rooms cool, 2 or 3 1000's is going to heat up like no bodys buisiness and will kill everything.one thousand watt usally runs about $100 per month to run 18/6 "verry expensive" when you add all your fans runing 24/0 .now you could do say 3 600's linked 2 gether no further than a foot apart in your flowering room and 2 for veg .you will have much cooler temps and your power bill will be reduced dramatically.well im tired and rambling but i must emphasize that most people to not consider the utility bills when buying every thing and then cannot afford to run there equipment.verry good luck to you