everything is looking good mate, as fish cake said you could go 12-12 till they show sex then flip back to veg, this wont slow down growth it will just get them showing sex sooner, or maybe for your next grow consider using glr for veg, it gets them growing a whole lot quicker and they show sex at around 2 weeks old, 3 weeks at the latest with mine, even plants that have been under 24-0 then put under glr start to show sex within a couple of days of flipping the lights to glr.
but reps for the plants mate, your doing a good job looking after them
but reps for the plants mate, your doing a good job looking after them