I claim nothing yet....this is the first time on that particular light schedule. We shall see and I will let everyone know if it made any difference or not. I read/spoke/saw a video (can't remember! LOL) somewhere that someone else uses this light schedule and gets somewhat bigger better buds, so I'm trying it out. I think he said he still does the two weeks of 12/12 to get it into flower mode, but it may be 13/11 throughout flowering. I am in day 26 of flowering, so it's too early to tell at this point, but I'm hoping for slightly bigger better myself! Some strains will not flower, or are very slow to flower on 13/11, so I have not tried the 13/11 on them yet...currently have AK47, and it seems to like it.