Autos can handle any light cycle you chose....allowing you to fit to YOUR life schedule. Most seem to run 20/4 or 18/6.
Being retired and all that other shit that comes with age, I personally choose to run 12/12 which lets me run photos alongside for shits and grins and for comparisons....
Keeping primary parameters like dli, ppfd , hum, etc in spec keeps my plants healthy and provides plenty of quality meds.