Guessing he uses LEDs and some mechanisation, especially for the orbs

http://www.davidgilliverphotography.com/other-light-Drawings.html

I've done a little bit of this (kids with sparklers and torches), thought
about progressing past that but never did
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.