GOLDEN Phosphorescent Green is a Heavy Body paint that can be applied to various surfaces. The unique pigment used has the ability to absorb and store natural and artificial light. Once the light source is removed (i.e. when the lights are turned off or the painted object is taken into a dark area), a bright, greenish glow is emitted for up to 15 minutes. The glow steadily diminishes as the stored light energy is released.