Companies like Rapala have come out with a series of UV coated lures. Most of these are used on bright fluorescent colors. UV Bright finish reflects more light energy, strengthening the lure’s visibility. Rapala’s UV finishes are a unique combination of fluorescent paints, reflective surfaces and optical brighteners that make the lures more brilliant in any light.
I have found that the best time to use the UV finish or twitch-baits like the Husky Jerk and crankbaits like the Tail Dancer is either under low-light conditions, in murky water, during strong algae blooms and especially during cold-fronts when fish are not necessarily feeding, but because of the strong UV colors they can still be teased into striking. If you have not fished the UV finish body baits or spoons, you may want to give them a try. It’s no gimmick, they really stand out and are very visible to fish!