Photoluminescent Exit Sign

12"W x 8"H. Photoluminescent (Glow-in-the-Dark) Plastic sign and includes (2) self-adhesive arrow stickers. Durable, non-electrical, non-toxic, non-radioactive, explosion proof, minimal installation and maintenance expense, washable. Easy installation: Two-sided tape on reverse. This sign is made to absorb and store energy from light and is immediately visible in sudden darkness. 5 minutes of light exposure (fluorescent, mercury vapor or metal halide light) on the face will provide 26+ hours of illumination.