no, 12/12 if for flowering, go 18/6, or 24 hours light(will require more watering, obviously) i prefer 24 hours, then flowering 12/12, but you have to be really consistant, plants dont just adapt to something that differs every day...
Did you get them to root on 12/12? or have they been vegging?
I would say, it's your call. Especially if the rooted under 12/s. I'm sure your yeild would be reduced, but you'll have a lotta' time into revegging, vegging, then reflowering. But I've known lotsa' folks to put them clones to flowering soon after they rooted. (SOG)
Reveg (1) one to clone from later.