Light-painting is a technique in which the light source is moved while taking a long exposure photograph.
Notice the four pin-lights that are taped to the golf club, plus two more blue gel lights behind each foot.

As you can see, the opportunities are limitless. In this case the gel lights behind his feet are green.
With most light-paintings, the subject must remain absolutely still for 20 to 30 seconds. No blinking or breathing!

Again, in most cases, the subject must remain absolutely still while the photographer "splashes" // "paints" light onto her with a pin-light (a super-skinny flashlight).

Again...there is no flash being used here...he's being "painted" with a miniature flashlight.
