No one wants to go to jail ganja rasta man...
1000w is very low, 600w is low, and so on and so on. People run 5-10kw in lights, in apartments and homes and have no trouble. you just have to be prepared and ready for any odd confrontations, inlaws, family, jehovas witnesses, etc. Keep the room sealed, cleaned, vented , blocked off and dont tell a soul. pay the bill. 1000w running 12/12 all year(roughly) will be $100 a month (average for west coast). amount of electricity in USA it is quoted to be 920kwh/mnth. So thats 1.27kwh 24hours a day. SO IF YOU have 1000w light running 12/12 -----thats 0.5kwh 24hrs a day (spread out) and you still have another 0.75kwh to use per day to stay under the low AVERAGE OF 920kwh/month. . i hoped that helped its helped me in the past.
I seem to get the idea you want to stick to the legal 12 immature OR 6 mature which is smart. UTILIZE YOUR LIGHTING for highest yields. Also use bigger pots 10/25gallon, veg for a long time, and get some BIG girls. I spoke to a guy at a dispensary who refused to go above 6 plants. So he used 2/600w in vertitubes and put the six around the light in the middle. 1.5-3lbs as a beginner....... If i was in your shoes id use 2 600w/6plants and veg my babes for a slightly longer time and be expecting NO LESS than 3oz per plant per plant at 1lb-2oz per harvest 4 times a year with flourescent veg room. GOOD LUCK SHOW PICS!!