It's a vague question. How many plants do you want to grow? Soil or Hydro? Organic or Synthetic Nutes? What's your budget?
I can tell that you will need a minimum of 5000 lumens per square foot, your exhaust fan needs to be able to vacate the air your grow room in under 5 minutes. Ideal temperature for growing cannabis is between 72-76 degrees Fahrenheit, Ideal soil PH is between 6.3-6.8 while hydro is 5.5-6.1.