What's that thing called in deja vu, where denzel washington uses that glow in the dark stick?

Question

he used the glow in the dark stick with all the lights off to see the girl's duck tape marks on her mouth in the lab when they were analyzing her corpse.what's that thing called. it showed everything that you can't see under normal light. i know its not called a glow in the dark stick but what's it really called. i'd like to buy one to find finger prints on my ps3 disc.

Answer 1

I didn't see the movie, but it was probably a UV lamp, sometimes called a black lamp.  Google "UV Lamp" or "black light" or something and see if it is what yu are looking for.