I can understand people wanting to change schedules for 'faster' growth and to save money but these plants have been growing for thousands of years more or less on the 18 6 and 12 12 schedule. Changing this schedule i believe, really cannot benefit a lot. I feel any chance that people think its better is luck and possibly a fluke.now people are gonna jumpthe gun here and im gonna get shot down like something chronic so go ahead, but this is my opinion and yes ypu can have your own.
Anyways, i think unless you adapt this plant by growing countless generations of the particular strain you could have an unpredictable and somewhat random results. Changing your timer to whatever is gonna have a hard time to beat a thousand years of geneticly inlayed responses. The plant can only grow soooooooo fast. Full stop.
In saying that, correct atmosphere, nutrients and temps ect are the absolute best way ypu can grow fast high quality bud, there is no better alternative than nature. Though we are lucky enough to be able to now hide (and i say this loosely lol) nature in the corner of you rooms and basements and tweek it to how we wnat and need it to perform.
Good luck mate, hope something i said can help or give you a little to ponder upon