Fame,
What kind of lights are they? I know you don't know the wattage, but are you using bulbs that are specifically designed for plant growth? A standard light bulb won't work because it doesn't put out the right spectrums of light, but you can pick up a CFL in the right spectrum range for plants at walmart for less then $20.
Have to agree with LED on the rest- your girl is way too young to need much in the way of nutrients, and shouldn't need all that much water either. Just give her light for at least 18 hours a day and make sure the soil stays slightly moist but not wet. Give her some time to grow and use that time to do some reading on this site and other places on the net so that you know what she's going to need to stay healthy and happy once you've got her growing good.