Looking good

If you can't get your hand on Mylar try using those windscreen shades you can get for a car and attach them to all four sides of your growing area. It really helps utilize the lights. Maybe try getting some more CFL's and fixtures so you can vegg a couple of plants and so you're more likely to end up with at least one female. And like BioChemx mentioned try getting the CFL's as close to the plant as possible, that was you'll have denser growth and the plant wont stretch.
Happy growing