here is a food shot I did using light painting technique. I set my exposure to give me 15-20 second time to do the lighting. For lighting, I used my SB-900 on low power with a small softbox attached to it and start making the lighting.
The image is done on the camera without digital blending usually accompany lighti painting.
In this image, is was traying to give the feeling of fresh hot meal in winter time ( raining time in my country, where the sky is covered with black clouds and the atomosphere is giving you like a sad feeling that make you happy if you get together with familly members on a fresh meal).