Glow in Dark Powder Pigment for use with Polyurethane, Epoxy Resin & Polyester Resin These amazing pigments are available in a fine powder form which are easily mixed into our clear artwork resins. They can be added to the resin or sprinkled over the surface and sealed in place. By day the powder crystals absorb UV light and after dark they release energy in the form of a long lasting ambient glow. ---Available in Cobalt , Green,and AQUA ---Various Pack sizes ---Will glow for up to 8 hours with as little as 30 minutes exposure to daylight ---Any ambient light nearby will reduce the visibility of the glow HOW DOES IT WORK? Unlike conventional pigments, photo luminescent fillers are not primary light reflectors, they are actual sources of light.