Before going into the details, let's be clear. Blacklights only make certain kinds of paints glow. So if you’re thinking about how to make black light with LED strip lights, make sure you have the correct kind of paint to decorate the surroundings. Without going too much into the specifics, UV light only affects fluorescent materials. UV-sensitive pigments present in fluorescent materials absorb UV light energy and slowly convert that energy into visible light.