I've heard 1 1000W light per bedroom is a safe bet if you don't want to take the chance of raising any suspicion. A 1000W light could illuminate 6'x6' area effectively. If you grow SOG, you could grow quite a few plants depending on container shape and size. (Even you reserved 1 sq. foot per plant, that's 36 plants per light)
realistically if you want 6 pounds a harvest you need great growing conditions and a high yielding strain ( atleast 1 gram per watt) and 2688 watts of light. i know that sounds really gay but you wont be able to get around it. if you cant afford to set up that much lighting ( dont forget your going to probably need to air cool these lights) forecast for a smaller yeld. not trying to be a downer i just dont want you to be crushed 2 months from nowi only want 2 grow about 20-25 plants but i want 2 harvest about 6p's so about 5oz a plant
i agree with oregon, if you want to harvest that much you are going to need to invest quite a bit of money in to your operation. Yoiu should do very well with two 1k lights, but your going to need them air cooled with inline fans as well and an outline fan. Those lights get very hot so venting is key. good luck hope you get what you wantrealistically if you want 6 pounds a harvest you need great growing conditions and a high yielding strain ( atleast 1 gram per watt) and 2688 watts of light. i know that sounds really gay but you wont be able to get around it. if you cant afford to set up that much lighting ( dont forget your going to probably need to air cool these lights) forecast for a smaller yeld. not trying to be a downer i just dont want you to be crushed 2 months from now