My brother in law taught me a lot about his style of growing back in the early 90s. They'd have like 3 mother plants, 40 or more they'd let go about 12" b4 going 12/12 and a shit load of cuttings/clones going all in separate rooms. Took up better than half the basement. That freaking elec meter was spinning like a top. You'd think it was gonna fly off like a clay pigeon. How no one ever figured it out was beyond me. Metal halides , HPS and fluorescents everywhere....Even if someone wrote it off as electric heating bill that wouldn't happen in the summer.