Is there much use of fluorescent colors that work in car headlights? For signs and markings, reflective paints seem to be more effective in showing up under headlights, particularly as the light is directed back towards the source, rather than scattered widely.
The article below describes the benefit of fluorescent dyes under weak natural light, as they can use the UV component of natural light to increase the amount of visible light reflected. Downshifting visible light to a longer wavelength, which is what fluorescence excited by visible light would do, would reduce the intensity of the reflected light.
The article below describes the benefit of fluorescent dyes under weak natural light, as they can use the UV component of natural light to increase the amount of visible light reflected. Downshifting visible light to a longer wavelength, which is what fluorescence excited by visible light would do, would reduce the intensity of the reflected light.
https://www.3m.com/3M/en_US/road-safety-us/resources/road-tr...