i ran a 12/12 setup from 24 veg cycle... after i had a few weeks of veg ( im a big believer of lst and topping) and since i didnt want the lights on when i wasnt home, i opted to have them on @ 7pm and off @ 7am. acquiring a simple plastic torx garden timer from home depot (15.99) makes this easy... all i had to do was shut the lights down at 7am one day, and set the timer for activation @ 7pm on and 7am off. double check the time of day on your timer to make sure it matches your local time. walk away... i havent adjusted the lighting schedule since that day, 44 days ago though in 9 days i will kick it back to 8/18 to start the final 7 days of flower followed by 48 hours of darkenss to enrich those beautiful nugs with lotsa tri's