If you have a huge grow op, you need a converter to avoid spiking your hydro meter to a ridiculous (and obvious) height. My buddy at work was telling me he used to have 350 plants growing in his attic. the first thing you want to do is make sure it is sealed, so when you turn on the lights you dont have streaks of light escaping. you also need a 200+ amp converter for that size of grow op as explained above.
Recently in my town a family thats grown for decades was busted because of the reason listed above-- domestic dispute. Apparently the kid was pissed off at the parents, called 911 and hung up, and unplugged the phone. the cops showed up and started snooping around, resulting in a "half a million dollar bust"... which was no where near the actual value, but you know cops..always exagerating and bullshitting.
Another guy supplied our small town for a while, but he was known for wayy over fertilizing his plants. there would sometimes be chunks of fertilizer in the bud when you busted it, no lie.
he broke up with his gf and she put him in jail, go figure. some ppl will never learn