They look a little streched.... If i was you id wait for another 3 sets of leaves before determining the sex of the plants, then either carry on with 12/12 or revert back to 24/0 or 18/6. 18/6 is better for your plants btw.
LIP Reviewed by LIP on . newbie grower with some subtle questions Hey guys I'm Dion, and I'm new to growing and I guess I've been making a stab at it for 3-4 weeks now. Now at first I had quite a few sharing small pots on top of a shelf with 2 2foot flourescent lamps with 20w plant/aquarium bulbs. I actually was fairly impressed with how they were comming along. Not the fastest growers for sure, but seemingly healthy. So as the time went on i weeded my way down to 6 plants as of now. they are in a roughly 24"X15-18"X10-12" plastic bin. I have lined the Rating: 5