what i do is get a 40qt coleman cooler, a pane of glass that will cover it and a shoplight that holds 2-40w floros.put your cuttings in the medium in the bottom of cooler. leave room in cooler for a bowl or large cup, fill with hot water & place in bottom of cooler w/pane of glass covering the cooler place shoplight on top of pane. once a day take cup or bowl out of cooler adding more hot water & in 7-10 days you'll have clones. i'm having a 90%success rate this way only because whatever doesn't have roots in 10 days i pitch regardless of how nice they look. i can fit 20-30 clones in the with room for more