The UV Larry Kit by NEBO® helps shed some new light on your situation. The Larry features 8 UV LEDs that can reveal materials that are not seen through normal lighting. While the naked eye has a hard time seeing these substances, they fluoresce when illuminated with UV light. The yellow wrap-around glasses enhance the UVs fluorescence drastically, making the substances stand out even more. UV LEDs can reveal materials that are not seen through normal lighting and can be very useful in: --- Crime scene investigation to reveal certain bodily fluids ---Document analysis and currency verification ---Leak detection (i.e. Freon) ---Rodent and pet stain detection ----Gemstone verification Features: ---8 LEDs output 2-3 milliwatts UV (3.4-3.6V; 20MA.) (wavelength: 410-415nm) (bulb rated for 110,000+ hours of life) ---Rotating magnetic clip ---Recessed LED housing ---Water-resistant reinforced plastic body design ---3 AAA batteries included ---Yellow tinted glasses help enhance the UVs fluorescent power PRC Specifications Output 2-3 milliwatts UV (3.4-3.6V; 20MA.) (wavelength: 410-415nm) Batteries Three AAA Batteries (included)