This permanent vinyl will glow in the dark. It looks white with a hint of green in the daylight and a bright green in the dark. To get this material to glow you have to charge it by exposing it to sunlight, or an indoor bright light. The more light you give it, the more it glows in the dark! This vinyl is rated for indoor use of up to 6 years, but can be used outdoors but will less life span.