As for glow in the dark dye, you can find it in the novelty spray in colors Any color that is light enough or has certain tones will show up under UV light, but I don't know where you'd find it. Hell, I might have it in my dye drawer and wouldn't know...don't have a black light.
WAIT (edit)
just looked.
some manic panic colors are. (flamingo pink/electric lava and more) - spencers and online stores are where you can find it for sure SPECIAL EFFECTS: Atomic Pink , Nuclear Red ,Cherry Bomb, Hi-Octane Orange, Joyride, Cupcake Pink , Bright as F#@$ Yellow, Napalm Orange - click the link or google, cause other places sell it.
there is also glow in the dark hair gel you can use.. used to wear it when i went to raves. its pretty fucking cool, it comes in different colors and glows really well for a really long time! my only problem with it is that is doesnt dry, it stays tacky..which makes it a bit difficult to keep your hair up with (if its long) and sucked when after crashing from a long ass rave you wake up to a sticky blue glow in the dark pillow lmao
with the voltage it works just like a glowstick.. when your ready to use it you mix it together and when it mixes it starts glowing. so its nice and bright ^.^
Just a note, I tried sticking my atomic pink hair close to blacklight once, it may have not been strong enough or something but nothing happened, and neither did my friends nuclear red hair. so yeah