Change light cycle to 10/14 one photo period girl? oops

[Kingfish45]

I'm at 6/18 cycle and using hydro grow RDWC. I think one girl is a photo period, because she shows no flowers and the other 5 plants show flowers. Would it HARM the 5 autos if I switch to 10/14 to get photo period plant to flower. I'm 50 days in this grow from when I dropped seeds. Could go 12/12 but I've done grows before at 10/14 with no problems.

 

[dean1963]

your girls are looking great, but i'd stay at 18/6 and if the other doesn't flower in a few weeks switch to 12/12.
just my thought.