only use the 12/12 schedule with ordinary seeds. With an auto flowering strain it is best to keep the light on either 24/24 or 18/24. The 12/12 will be no good for an auto flowering plant.The clue is in the name-(auto)meaning that it will automatically go into flower even with the 24/24 schedule.To save on electric some suggest using the 18/24 schedule..hope this helped