The process:
IN COMPLETE DARKNESS WITH THE CAMERA SHUTTER OPEN.YOU MOVE LIGHTS ON AND ARROUND A SUBJECT WITH PEN LIGHTS, FLASH LIGHTS OR ANYTHING THAT EMITS LIGHT.
FOR A SINGLE TAKE EXPOSURE TIMES CAN VARY BETWEEN 1 SECONDS TO 30 MINUTES.

http://en.wikipedia.org/wiki/Light_painting

“This is a new time where digital photography is part of the process. The moving lights in the photographs are done by hand during a long exposure in the dark while the model is standing still. The process of creation is still analogue, but the medium is now digital. This opens a door to new possibilities. Some adjustments are done digitally afterwards.” -PR