Glow-in-the-dark pigments are special materials that can absorb light and then re-emit it, creating a glowing effect in the dark. These pigments typically contain phosphorescent compounds, which store energy from light sources like sunlight or artificial lights. When the light source is removed, the pigments slowly release the stored energy as visible light. These pigments are commonly used in various applications, including toys, paint, and safety signs. They can enhance visibility in low-light conditions and add a fun element to products. The glow can last from a few minutes to several hours, depending on the type of pigment and the amount of light absorbed.