So how does it work? Well, first things first, not to be confused with A glow in the dark SURFACE that works as simple as turnING the lights out and that's how it glows. However, reflective objects and fabrics, work off of a separate source of light like a flashlight, camera flash, head lights, etc, to flash light back at you! It's initial purpose was to be able to be seen in the night time, for safety reasons of course. So bikers, police officers, runners, and traffic directors wear reflective vests, and reflective patches, to avoid being hit by cars if they're out at night! At first glance, the reflective material itself usually just looks like a almost metallic grey surface, but when a light is pointed on the material, it reflects back, giving off the white luminescent glow!