Glow in Dark Paint - Radiate light in dark , Glow Time- 6 to 8 hours, 100 ml paint. Their tendency is to absorb light first and then release the absorbed energy by glowing when in dark. The more the painted surface will be in light, the more it will glow and for a longer time. It is a water based paint. It can be used for indoor, outdoor, on the surface of wood, metal, dry-wall, and more. Apply it with a brush, roller, and spray gun. Store it in a dry, cool place, 0~50°c, avoid sunlight