The Extreme Glow beads, from Radical Glow, are glow in the dark beads exhibiting an "extreme" amount of glow. These beads are intended to be used for lures and bait when fishing for kokanee, steelhead, salmon or lake trout. Radical Glow Technology allows their products to glow extremely bright and exceptionally long in their own colors. It’s like having two products in one: The “day” colors you need like pink, natural green, chartreuse, red, and blue combined with a “Glow” of the same color as lighting changes or water darkens. Radical Glow colors provide over 10 times the brightness and 8 times the duration of conventional glow colorants. For best glow results, charge Radical Glow products with natural sun light or halogen lamps. Use Radical Glow when you want your bait and lures to be seen. The Radical Glow Extreme Glow Beads are available in four sizes: 4mm, 5mm, 6mm and 8mm. Quantities vary - see chart below.