Thank you, Gentlemen.
Evidently people with lupus erythematosus are very sensitive to UV exposure, and indoor lighting can be a problem for them if certain precautions are not followed. This publication contains info that may help answer the OP’s questions.
About those posters, and fluorescent things in general: does UV actually cause the pigment to emit light, or is the pigment simply reflecting a peculiar wavelength of the light source (like blue paint reflecting only blue light and absorbing the rest)? I suspect the answer is “emit” but fluorescent colors seem to be very specific without much shading. (humble admission of ignorance)
True fluorescence means absorbing invisible UV light and re-emitting it as visible light. Any given fluorescent material will have very specific wavelengths that it absorbs and emits. Of course, there are also plenty of things which are popularly described as fluorescent, but which are just ordinary colors that happen to be eye-catching.
The pigments are fluorescent. That means they have molecules that absorb UV light, get their electrons all excited, and then emit a longer-wavelength photon after the electrons drop to their rest level.
Often, the color of the pigment in normal light is completely different from the color they fluoresce. Just look at a laundered shirt - it is while in normal light, and vivid blue in UV.
Fluorescence is the very specific physics effect of a substance actively emitting photons by having excited electrons return to their ground state. There are many possible causes for the electrons to become excited, but in the context of a fluorescent light, it’s photons from the mercury vapor interacting with the atoms and energizing the electrons into the excited state.
In other words, the atoms absorb photons (in this case, UV frequency) and become excited; then the electrons fall back into their ground state, emitting the excess energy in the form of photons.
Fluorescence in the case of photonic excitation is usually a lower frequency (e.g., absorb UV, emit a variety of visible frequencies commonly referred to as “white light”). This is a phenomenon called the Stokes shift.
ETA: Like beowulff sed
The tradition of Hollywood movie stars wearing sunglasses wasn’t just because of the California sun; the arc lamps used on movie sets back in the silent picture days produced enough UV to cause eye problems if exposure wasn’t limited.
Have you considered teaching Freshman engineering courses? 
I was going to make it a triple-entendre, but thought better of it!
