Fluorescent paints and black-light effects

Fluorescent paints offer a wide range of pigments and chroma which also 'glow' when exposed to the long-wave "ultraviolet" frequencies (UV).
Glow in the dark material UV frequencies are found in sunlight and some artificial lights, but they—and their glowing-paint applications—are popularly known as black light and 'black-light effects', respectively.In luminous paint the visible light component—sometimes known as "white light"—tends to be reflected and perceived normally, as colour; while the UV component of light is modified, 'stepped down' energetically into longer wavelengths, producing additional visible light frequencies, which are then emitted alongside the reflected white light. Human eyes perceive these changes as the unusual 'glow' of fluorescence.