In regard to UV being the hot topic with fishing lures lately, actual UV light is being emitted off of PET ( polyethylene terephthalate ) film (lure tape) with holographic as well as glow in the dark properties. I doubt toilet paper would hold up on a flasher or dodger..lol. Since natural light turns black after a depth of approximately 14 feet, UV properties of a lure is just another weapon that MAY help in attracting salmonids depending on the light spectrum (from reds, oranges, yellows etc in nanometers) being emitted under different light conditions including clear as well as cloudy days.