The Radical Glow Mini Grubs are soft plastic grubs which display a bright, glowing appearance when viewed by predatory species of fish. Fisheries biologists have concluded that fish see light and color much differently than humans. Fish have developed the ability to see reflected UV light as means of distinguishing predators from non-predators and also to more accurately pick out forage species that are transparent in nature. As a result, fish see lures much like we would see them when placed under a halogen light. Radical Glow, which makes a number of UV enhanced products, developed their Mini Glow Grubs with infused UV enhancements to bring more attention to the presentation. Radical Glow Technology glows very bright for an exceptionally long time! Just leave your Radical Glow baits out in direct sunlight for a few moments before threading them on the line and they will be ready to go.