Luminophore
Luminophore – a material that glows in the dark after being exposed to natural or artificial light. Luminophore is a fine-grained non-flammable powder, and does not contain any radioactive isotopes. It is completely safe and has a wide range of uses.
In daylight, Luminophore applied to exterior surfaces has a greenish-yellow shade. In the dark, it glows light green. The length of time that the surface glows is governed by two factors: 1) how long the paint is exposed to a light source; and 2) how strong the light source is. The material can be charged by any light source: the sun, ordinary electric spindle lamps, mercury arc lamps, florescent lamps, ultraviolet and the like.