I ran my autos 24/0 until they were near harvest, at this time I cut the lights to 18/6 and the aroma picked up greatly. I had read they need a sleep cycle to make more smells, and it did. Toward the end they went to 14.5/9.5 as I had young photos/clones in the room, then to 12/12s and are now on 14/10 (they will stay in flower), but most of this was for the spring summer photos, with only 1 auto left. I use organic soil, and have not yet done hydro,,