Glow in the dark paint pigment. Our fine grade Vivid Green Glow in the Dark Powder is the brightest glow in the dark pigment currently being readily manufactured. It can be used in a variety of mediums including plastic, paint, fiberglass, concrete, wax, and gel. In its first seconds after charging, it is brighter than the popular Cyalume Glow Sticks. Ultra Green Glow in the Dark Powder is 10 times brighter than the popular Zinc-based glow in the dark products available in most department stores. Technically, it will continue to glow for days. But us humans can see it for about 12 hours after a full charge. The raw glow pigment is: Alkaline Rare Earth Metal Silicate-Aluminate Oxide Europium Doped