Lighting Loco and other lamps

From the Constructional Suggestions page of the April 1935 Model Railway Constructor

Luminous paint, though rather expensive to purchase, is ideal for "illuminating" the otherwise lifeless loco and coach lamps. The tiniest spot placed on the bull-eye of the lamp is very effective in the dark. It is, of course, only effective for white lights.
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Obviously the paint won't be as radioactive as it was in the 30's, and the "light" will be a bit green, but this sounds like a promising idea. Has anyone tried it ?