Auto Flower Hep Plz.

hi this is my frist auto grow im growing one il diavolo auto from delicious seeds its under a 90w ufo led in a 11l pot it was growing for 6 weeks with no sign of pre flowers got told that the plant must not have the auto gen so put it in to 12/12 2 weeks ago now its in full bloom should i put it back to 20/4 or leve it how it is any help plz

if its flowering on 12/12 then why go back to 20/4 when it dint flower? i say your better off leaving it on the 12/12 schedule, messing with the light schedule even if its suppose to be "auto" is not good bro.