We've seen a number of creative interpretations of light graffiti, including athletic light graffiti that plays basketball, but I'm also particularly drawn to 'Light Paint Piano Player' by Ryan Cashman, which features a glowing light paint figure playing feverishly on the piano--facial expressions and all.
Ryan Cashman is an animator and visual artist from San Diego, California. He says that 'Light Paint Piano Player' is by far his most successful video to date in terms of popularity.
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Cutting Edge Photography
Philips Digital Light Painting Kit
Light As A Brush, Night As A Canvas
Athletic Light Graffiti
3-D Light Graffiti