Only dwc and areo are non stop. Ebb and flow and ebb and grow, drip systems turn off. Nft can be both. But this also depends on you media you deside to use. Hydroton, RW, perlite, like more feedings then coco and coco mixes. Or atleast in my setup. I run a mix and water 2 times lights on. So to give a better answer please give more details on what you want to run.