Keep doing what you'r doing with the 12\12.Sex should show in 14 to 20 days.Seeds started in this way don't do a lot of branching & grow a large central cola, so you can grow plants closer together.Plant density makes up for the no-veg time hight wise.Got to be careful of burning young seedlings with HID lighting.Most 12\12 growers start with floro maybe 3 weeks & then switch to HID to the finish.