Rust-Oleum Specialty Glow In The Dark MAX Spray Paint is a superior luminous paint that creates a glowing effect in the dark after being charged by natural or artificial light. Glow in the Dark MAX glows two times stronger than the leading glow in the dark paint. Glow in the Dark MAX offers superior glow power for easier visibility in the dark. Glowing effect can last up to 4-8 hours under optimal conditions. It can be applied to wood, metal, dry wall, ceramic, plastic and more. Periodic re-application may be needed for outdoor use.