The sex should be pretty obvious once it is showing. Using cfls might have you behind the 21/24 day framework--I'm not sure but think it runs a bit behind the HPS numbers. Look for very thin hairs. They should look white and come in pairs but are diferent from the horn-like green growths that one sees up the main stem at each branch interval. I think I remember this being new to you--if I'm mistaken then excuse me for stating the known. Your color and growth look nice and healthy overall. That white paint sure does clean up the overall look nicely, too.