"The light art performance photography (briefly LAPP), is one-shot long time bulb exposure Photography, performed additionally with movement of light.
LAPP originates on a real-time basis directly in front of the camera. Created between opening and closing the shutter. The pictures shown here are in each case one single photo, not a result of working on the computer. With especially developed light and luminous tools they are projected on the sensor. within a performance, form and color by light arrange such complicated figures and light forms."
Wrongly filed under "Digital Graffitti" on this amazing site, the photos above, plus a number of other wonderful light photographs can be found here. (Hint: When you get to this page, just click near the thumbnail bar at the bottom of the page to see the entire strip; drop-down menus at the top.) Enjoy!
Note: This link has a permanent spot - along with other eye-candy, on the sidebar of Trans-D, in the continuously updated "Not Necessarily related - and related - Digital Delights" section.