Fluorescent makeup looks great under the black lights at clubs, but it generally comes in colors you might not want to be wearing once the house lights come on (or out to dinner beforehand, for that matter). And that's why Make Up For Ever Fluo Night Black Light Pigment ($31) is so smart. It's just a fine powder that you mix into whatever makeup you're applying, and it glows under black lights without changing your makeup colors. So you can go from looking pretty and polished to totally wild with the flick of a light switch, or even create "hidden" designs or messages that won't show up until you hit the UV. A little goes a long way, too, so a small jar should last you through months of Friday nights.