Here's video of "Light Art" created with new technology, it reminds me of playing with sparklers on the Fourth of July.

Move over, Jackson Pollock. Artist Timo Arnall eschews the oil paints for light by creating visualizations of WiFi signals. Says Arnall on Vimeo:

This project explores the invisible terrain of WiFi networks in urban spaces by light painting signal strength in long-exposure photographs.

A four-metre long measuring rod with 80 points of light reveals cross-sections through WiFi networks using a photographic technique called light-painting.

Paris Light Art (You Tube)