Grow room set ups can get quite complicated. Keep in mind that more equipment does not necessarily mean you have a better setup. Simple is always good because the more equipment you have, the more likely it is to malfunction. There are five essentials to plant growth: Light, Nutrients, Air, Water, and Correct Temperature. All of these things must be correct in order for plants to survive. We must set up the grow room so that it will deliver the essentials in the most efficient way.
Lighting is provided by HID, LED, or Fluorescent grow lamps. Nutrients can be purchased from a number of companies. Air is free, but must be vented and circulated by fans and hoses. The temperature can be difficult to control. There are many methods of helping the heat problems.
There are many products out there so be careful not to waste money! Study before you buy. I would recommend checking out
http://www.hugegrowrilla.blogspot.com
There is some great grow room info including how to setup your room and how to properly maintain it.