Lol, there is no way in hell that they will pick you up with thermal imaging not with the 4 cfls. As for the smell it should be fine, though some plants can stink up the place quite a bit if your ventilation isn’t up to scratch, as long as you are the only person in the house or anyone staying there is fine with you growing it shouldn’t be a problem.
Anyways I’m sure the DEA has better things to worry about than a guy with three plants in his attic.