Over the years have used both. Have found that the 13/11 cycle does shorten "transition stage" and also reduces flower times by 1 -2 weeks (depends on strain). Understand that a plant needs 13 to 13.5 hrs of dark to stimulate the plant to start rooting. will look again for the biology/scientific info on this. Like to hear if anyone else has ever tried this cycle ? Thanks will make poll for question