With fluorescent lighting, look for actual wattage, not the equivalent. I've learned that cannabis plants generally require 100 watts of light for the first plant, then 50 watts for every plant after that, so you're going to need some more lights soon. Try sticking with CFL's or LED's in that small of a space.
I'd also try to get some perlite in your soil mix when you transplant unless you plan to buy a lighter soil, but even then, adding some perlite will help aerate your mix, getting more oxygen to your roots, while still retaining moisture. That soil looks a little heavy in clay. Other than that, she looks healthy. Post back with any questions and welcome to RIU.