For all UV models of Gearlight flashlights:
When crude or refined oil absorbs ultraviolet (UV) light, it emits a unique fluorescence spectrum. This is why this would work for oil. It is not designed to find a water leak.
For all UV models of Gearlight flashlights:
When crude or refined oil absorbs ultraviolet (UV) light, it emits a unique fluorescence spectrum. This is why this would work for oil. It is not designed to find a water leak.