Indoor CFL Indica Plant

yo i just started a seed in my closet under cfl lights. i have about 100 watts over the plant. i am planning on getting 2 more and having 100 watts over each plant.
the first leaves are starting to turn yellow. i was wondering if this had to do with the lighting being not close enough or too close.
or does it have to do with the watering.

downsized_0812001306.jpg picture by guitarist1050 - Photobucket

could be anything from wrong soil to many nutes (nutrition) to wet, to humid, to hot, no circulation of air, i just started reading up on this stuff and have been able to skip some of the mistakes made by most noobs and i just started my own thread and cant wait for the advice /comments. pics definitely help in getting the correct advice from the members of this forum. good luck