52 Light-Up These are the same standard playing cards you know and love with one important distinction: they look super sick under UV lighting! Black Light Playing Cards are a great staple to have for any party where the lights are too low for regular cards. Is This Your Card? If you’re a magician, these Black Light Playing Cards can also be used as a prop for performances under blacklight to make your act truly memorable! It’s also nifty for professional cosplayers who have a penchant for going as The Joker. Grab a deck today to turn heads at your next blacklight party!