How long before I see something once plants enter 12/12???

Hi all, new to the community, hope to get to know all of you ...lol

NEWAYS.... My plants have been ubder a lightblaze 400 now for 2 weeks, I have 12 plants and I was wondering how long before I see whatever it is I am supposed to be seeing???? NE info would be greatly apprecited.... thanx

GG

you should see some white hairs soon which is start of bud if female or little pods with no hairs coming out of them if male, could still take them a couple of weeks. could turn lights off for 24 or 36 hours to kick them into action, sativa take longer than indica.