blacklight ink is perfectly safe, its illuminous ink that contains radioactivity. This looks quite cool, at least you've incorperated the uv ink with something that also looks good in normal light.
UV ink is safer than regular tattoo pigment! You guys are possibly confusing UV with Glow in the dark, that stuff is ILLEGAL because it is highly toxic and doesn't stay where you tattoo it. UV/Backlight ink is amazing, and this is a nice piece. :)