Evil Mad Scientist Windell writes:

Last year David Friedman published on his blog Ironic Sans an interesting design concept for something that he called The Bulbdial Clock. That’s like a sundial, but with better resolution– not just an hour hand, but a minute and second hand as well, each given as a shadow from moving artificial light sources (bulbs).

We’ve recently put together a working bulbdial clock, with an implementation somewhat different from that of the original concept.

A Bulbdial Clock