I believe it's pretty common practice; not just the amount of power being used as a red flag, but obvious patterns too - for cannabis you normally have it going

I believe it's pretty common practice; not just the amount of power being used as a red flag, but obvious patterns too - for cannabis you normally have it going for 16+ hrs of light for it's vegetative cycle, then switch to 12 hr of light for flowering, so they can use that pattern too. Presumably this stuff is only checked post-suspicion, and not automated and parallel construction stuff done.