So I would assume the only way you could get 'caught' is by a few things
blabbing to your friends you have a plant you're growing
increasing power bills that would suggest something 'fishy' is going on
the smell overwhelming your neighbors etc.
I could of sworn I saw some kind of special on Discovery or A&E about a year ago showing that heat sensing equipment in use on a helicopter just flying over people houses watching.
Ahhh, also adding a question here. How much heat would a single 400 put off, or maybe the equivalent to (fishtank, pool table light etc. I know these aren't same just examples) Thanks again for questions asked guy, I appreciate it