When you solved your own problem. An incandescent light will cause the plant to stretch, because the plant is not getting the lumens in the proper color spectrum it needs so it will grow into the light and burn itself to death trying to get light, if left unattended. Fix get some cfl's at the very least.
Soil from outside unless stolen out of your neighbors prize rose garden has little to none nutrients in it. It also most likely is full of bugs.
Fixing the soil, you'll need to use some fertilizer. What do you have laying around the house? or is there a garden center near? And if you are going to transplant to a bigger pot, try and get some better soil.
Do some reading here, start with the Sticky threads in the Newbie section.