um well if theyre looking for inside grows then itll be big organised grows capable of producing enough heat to stand out (probaly a couple thousand watts at least) an average 400-600w light is barely more powerful then anything household.

outside grows im not sure, its not like they have a computer scan for plants so i assume itll be just looking out on likely places people would grow, which would be easy enough to spot since the plants cant be covered by trees etc blocking light