UV Black Light colors may be mixed together to create new colors, while glow in the dark products should not be mixed because the resulting mixture will produce inferior glow properties. Glow in the dark products use UV light to soak up energy, then will glow without the light. With hard surfaces, the urine will usually dry as a thinner layer and can be easily cleaned or worn away. UV Black Light Products need a UV black light source to fluoresce (glow). This is because pet urine is more likely to dry in larger amounts in porous absorbent surfaces, allowing for a stronger glow. Surfaces like carpet or upholstery will typically work better with UV light in comparison with tile, hardwood floor, and other hard surfaces. If this is the case, there may be too little urine remaining on the surface to produce a strong glow. It is important to keep in mind, however, that with highly absorbent materials there is a chance that the urine has absorbed deep into the material beyond the top layers. To produce the strongest glow, allow the pet urine to completely dry before attempting to locate it with your UV light. To better understand the difference, it’s essential to know what each. So in other words, black light is UV light (450-100nm), covering the 400-320nm spectrum. Black light is nothing but UVA light, while UV light is basically composed out of UVA, UVB and UVC. Even if the stain has had time to try, humidity in the air (e.g., in the bathroom, kitchen, or outdoor areas) or moisture on the stained surface may impair the efficacy of the black light. In a nutshell, there isn’t quite a difference, but a misunderstanding of the terms. If the urine is fresh or not entirely dry, the glow it emits will be faint or nonexistent.
UV black lights are only effective in detecting dry pet urine.
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