I want to build a small running lamp (?) for my Conductor’s Car #1 and would like to have it actually light-up. If I used a bulb and DC power, it would have to be very tiny.
Does anyone know of a source for the small radioactive element (?) that is used in compasses and watches? It might be interesting if a speck of this element could be inserted into a short colored dowel that would glow in the dark. Maybe this is too difficult or expensive, but I thought I’d ask.