I'm in the US (Filling out profile now...)

Philips makes a 75W 12V bulb with the same base. That might be a nice solution.

Most bulbs seem to be "multi-reflective," having what looks like a faceted inner surface. It seems to me that would be a huge problem with printing, but maybe I'm wrong. Anyone know if by the time the light gets down to the negative it won't matter?

Tim