do Sea of Green my friend and you'll have much better results and much higher yields, Just a small desktop fan or 2 should do for each area, dont know about the humidity tbh, dedicated housing isnt a neccisity although i highly reccomend sum mylar or other reflective materials, ur m8 is an idiot unless hes talking aBOUT THE UV LIGHTS FOR THE CLONES but otherwise hps is the way to go, yeah the basics r pots (unless u want to go hydroponic that is) and soil ph tester thingy nutrients humidity is not essential but a thermometer is quite handy, if you want cheap and good grow equipment then go to www.growshopalien.com./shoponline theyre very cheap and u can get a 600w hps (inc ballast bulb reflector the works) for under £70! that shouldb enough for now m8 and good luk (if u need any more help post again or go to www.marijuanagrowing.com by jorge cervantes) HAppy Growing!