Uv-reactive tattoos and glow-in-the-dark tattoos for the Halloween-party. Are they a good idea or a very bad one?

Lately I've seen more and more articles trat promotes the Uv-reactive tattoos and even the (in)famous "glow-in-the-dark" tattoos. It's true that these two kinds of tattoos are extremely spectacular, but before decide for one of them you should be aware about the possible side-effects of these peculiar tattoo-inks (on the other hand, there is no such thing as an 100% safe tattoo-ink; even the ink used for the temporary-tattoos presents risks for your health).

If the tattoo is meant to last only for one night you might consider getting a fluorescent-tattoo drawn with an alcohol-based ink, which is temporary, can be easily removed, it's cheap, it's pretty spectacular, it doesn't heart and carries fewer health risks than the fluorescent tattoos (not to mention the health risks carried by the phosphorescent tattoos).