So, small grow in a closet on a budget. Here is what I would recommend:
Buy 4 26w 6500k CFLs. Install them into a clip on light with a reflector. Surround the plant. You know you have a female, right?
When your ready to flower replace the 6500k with 4 new 42w 2700K CFLs. Take her through harvest with these.
If your going to use MG soil, at least put some more perlite in the soil for better rot health. MG hold water pretty bad. Not a good thing for weed. A small bag of perlite will set you back $5. It will be well worth it.
have fun and enjoy. Be prepared. Pot is not addictive, but growing is.