Switching from 12/12 to 18/6??

Hi, Im currently in day 25 for 2 of my plants (white widow & auto ak47) & citrus kush is about a week old.

All plants have been 12/12 from birth, however, since i dont need to flower from seed anymore cuz i have much more space in my closet which is where im growing.

I was wondering if I switched to 18/6, for all of my plants, and let my auto ak47 automatically flower, while my other white widow, and cirtus kush vegitate. My white widow is day 25 and it hasnt shown sex, so im wondering if switching to 18/6 might shock the plantt??

PLEASE HELP

1st Pic- Lowlife AK47( Day 25 on 12/12) autoflower
2nd Pic Lowlife AK47 Pistols
3rd Pic White Widow ( Day 25 on 12/12)
4th Pic Citrus Kush ( Day 6 on 12/12)

ide go 18/6 for 3 days then 24hrs but that early 12/12 and then switching to different lighting also will hermi a plant but u got to do something with those babies because 12/12 from seed is no good.

Hey but ime sure somebody will disagree with me but theyll be wrong!!