What it is Hareline Lite-Brite is a flashy Krystal Flash-style material used here as the body on a Lite Brite Perdigon-style euro nymph. Wrapped slim under a smooth coating, it gives you a tight profile that gets down fast and still throws off light underwater. What to tie with it Use it as a wrapped body material on slim nymphs and perdigons, building a quick taper and then locking it in with your finish. It also crosses over well into emergers and attractor-style flies when you want a little extra flash without adding bulk. Flies and the fish they're for Lite Brite Perdigon and Lite Brite Perdigon UV are tied as deepwater trout nymphing flies, the kind you run on a euro rig to reach fish holding tight to the bottom in rivers and tailwaters. Fished as mayfly attractor nymphs, they’re a go-to when trout are eating small mayfly nymphs but you need something that shows up and sinks quickly. How it compares Lite Brite Perdigon UV versus the regular Lite Brite Perdigon mainly comes down to the available picker options rather than a different job on the water. Both are tied to the same slim, fast-sinking perdigon profile.