Once it starts coming up, keep the lights back at first so you don't burn the poor new thing. Then you can bring them closer over a few days/week. Put the bulb near the back of your hand to see how warm it is. MJ is even more sensitive than your hand.

Get a fan blowing on the seedling right away to create a light breeze. This circulates the air and strengthens the stem.

Your two 15W lights will be ok for one plant for maybe a few weeks. Combined, they will give you about 1500 lumens, which, at the bare minimum, will cover 1/2 a sq ft.