The urine of cats glows under a black light. Cat urine will glow brightly underneath a black light because it contains phosphorus. Shining a black light around your household will also make it easier for you to clean after your cats.
100 Mind-Blowing Phosphorus Facts
Cat urine glows under a black light. Black lights can be used to detect any body fluids, but cat urine glows particularly bright under ultraviolet light primarily because it contains the element phosphorus.
Cat urine glows under a black light. Due to containing phosphorus, cat urine glows brighter under an ultraviolet light.