It's my understanding they made alot of flourocarbon line to be uv resistant. Flourocarbon lines have a "refractive index very close to that of water". Because of these things it will not show up good in UV light black lights. I use P Line Halo flourocarbon alot and it's a lime green color... Doesn't show at all in the blacklight. I think Cabelas has a new flourocarbon that is a bright pink. It maybe worth a look in the blacklight.