If you really want to play it safe, 12 veg & 6 flower is where you want to be. I would like to share a true story that is public record. The event took place in Vacaville, CA. You can look it up on the blotter reports for September 2011. The incidence involved Marijuana of course. A couple, each possessing a valid Doctor's Recommendation, were growing twelve plants in their backyard. Awakened from noises in the middle of the night, they turned on their backyard lights and called the police. When the police arrived, they investigated the crime scene and found two plants missing; ripped from the ground. One clever officer on the call took detailed notes of the crime scene. No issue was made of the other plants and no question of legalities were raised.
Now here is where this story gets good. Later that morning, this clever officer was summoned to a call at a local crack/dive motel due to a disturbance created by a guest. The officer discovered several youths, some under aged and no citizenship, behaving erratic. During the course of the investigation, the officer discovers the cleaned branches of two Marijuana plants, as well as the trimmed flower. Alcohol and methamphetamine was also found.
Now don't accuse smokers of not being good citizens. The officer immediately connected the plants to his earlier call, noting the material that was used to tie up and support the plants. Just as in other investigations, the officer picked up the husband to identify the plant remains. Really. This did happen. It's great. The poor guy didn't get his medicine back due to the fact that it was evidence, but as a medical grower gave legal testimony as the victim of a robbery.
I hope that you are safe with 12/6. If you are in danger, then so am I. We are all in danger. Let us all hope that if they should come knocking at the door, they will be as cool as this clever Vacaville officer.
Sorry. The numbers you are talking about sounds like prison time to me.