Brady 3000-1 Glow-In-The-Dark-Ultra Reflective Number - 1 3 Series Numbers reflect light and glow bright combining the highest level of reflectivity with advanced glow-in-the-dark technology. Unique micro-prism reflectors allow for maximum visibility from a greater distance, wider angle and lower light source than standard reflective vinyl. Designed for permanent application in severe outdoor environments as well as indoors. Special acrylic adhesive adheres strongly for a secure and permanent application.