Cool Cat Pee Black Light Ideas. We have an easy to use handheld black light that is perfect for this use. Web our small but powerful black light from cleansmart is ideal for finding those awful cat pee odours.

Some people find it easier to spot urine with a blacklight at night. When phosphorus is exposed to ultraviolet light, it emits a bright glow. It works because when urine dries, it crystallizes (due to the urea component), and it’s those crystals that glow in uv light.