a phosphorescent vehicle part identification accessory comprising an article of molded plastic having formed therewith a phosphorescent compound adapted for glowing for a period of time following exposure to light energy . the phosphorescent article is secured to the vehicle in a location thereon for receiving illumination from other vehicles and external light sources and providing a decaying glow therefrom . the phosphorescent article may comprise a vehicle wheel valve stem cap , a strip , or a tab adapted for positioning about a vehicle keyhole .