Painting with light and a digital camera

My hands-on class went a little late today, so the drive from Vista back to Poway was after dark. The freeway out of San Diego was packed - even at 7 pm. Trevern Dawes had told me about a digital photography technique he uses to paint with light, so I took the opportunity to try it out on the way back to Theresa's house. All of these photos are the result of that experiment. I think it's pretty neat.