go to 12/12 early and determine the sex. Take the males out and put the females back to 18/6 or whatever you are doing for veg.
Or block the light to one branch or bud site for 12 hours a day using a dark black plastic bag. After a week or or two you should see pistols or balls.
Then once you have your females determined work with clones so you don't have to worry about males anymore
Also you may get better utilization of those CFLs if you can get them on their sides. I saw someone make homemade reflectors with soda cans which I though was a great idea. You can redirect the half the light off that bulb back towards the plant. If I find it again I'll come back and post the link for you.
Or block the light to one branch or bud site for 12 hours a day using a dark black plastic bag. After a week or or two you should see pistols or balls.
Then once you have your females determined work with clones so you don't have to worry about males anymore
Also you may get better utilization of those CFLs if you can get them on their sides. I saw someone make homemade reflectors with soda cans which I though was a great idea. You can redirect the half the light off that bulb back towards the plant. If I find it again I'll come back and post the link for you.