male or female preflower..need grow space

Get a600w man, 250w isn't enough light for a 5x5(I'm assuming you're talking feet ) 50w h.I.d per 15" square is generally considered minimum for good results(.3-.7g per watt)

I have four plants from seed under 24/7 under CFLs currently. I want to use one or two for a mother depending on how many ladies I get. They are 2 months old and are not showing any pre-flowing signs. I cut 2 clones from each 9 days ago and was planning to put them in12/12 to sex but, I fucked up and mixed them up while watering today. I have an idea which is which but only positive about one pair matching the adult... After reading these posts I'm thinking of switching them to the MH under 18/6 and hoping they will show there sex soon. I'm still a nube at this and would like any ideas input or suggestions you all can give me. cheers!