You could throw a cutting under a 14 dark 10 light photoperiod,it does seem to be quicker than 12/12 in my limited experience with it.Most of the time,if you have a good magnifying glass you really can tell at 3 or 4 weeks,too many folks try with the naked eye I think.Forgive me people if it seems I'm turboposting and I'm brand new,I really hope I can help some folks here and get some help myself.Sometimes people misunderstand I'll lay off for now lol