Although glow-in-the-dark / Nachtleuchtpapier appears to shine very bright in real life, taking a picture of it is very difficult, because there's just not that much light reaching the camera...
Still, I think you get the picture (some pun intended ;o)
Parts and instructions to build your own papercraft LEGO Ghost (+many more paper models):
[link]Have fun building and happy early Halloween!
Uiteindelijk bleek het papier een soort zelfklevend, stickerpapier te zijn, maar dat is eigenlijk niet nodig natuurlijk: gewoon "Nachtleuchtpapier" of glow-in-the-dark paper is waarschijnlijk zelfs nog handiger. ;o)
It works the same way as other glow-in-the-dark things (like those plastic glow-in-the-dark stars and moons for in a children's bedroom: when you put it in the bright shun or under a lamp for a while, particles in the paper get "charged", and when you turn off the lights, they emit the charged light back out so they glow.
Other people have suggested that you can use glow-in-the dark paint to paint the ghost shroud instead of printing it on glow-in-the-dark paper. I haven't tried that, but the effect should be the same.
The kind I bought was €8,50 for 5 sheets (you need 5 sheets for all the shroud parts).
That turned out to be self-adhesive (sticker) paper, but you don't really need that of course. Regular glow-in-the-dark paper might be a little less expensive, and it also varies per shop of course, but it will always be more expensive than regular paper/cardstock of course.
But if you can't afford it and still want to build a LEGO ghost, you can also just use regular paper/cardstock.
(and if later on you decide you still want to try and build it out of glow-in-the dark paper, you can just change the shroud because it's a seperate part ;o)