You can also use it to locate food stains, check ID authenticity, and even verify notes. It is worth noting that as a spotlight works best when it is dark in the room. Strong ultraviolet light makes it easy to create a fun field game for kids or leave secret romantic messages for signature. Performance and use Detects invisible pet urine. Finding minerals. Authenticate currency / driver's license, official ID cards and passports. Makes fluorescent objects glow at parties or Halloween. How black light works by showing phosphorus. Substance emitting visible light due to radiation. Because the naked eye cannot be seen, we rely on help to solve them. Black light allows this. Specifications: Wavelength: 365~370nm. Source: LED. Light: invisible light. Zoom capability: adjustable focus. Material: aluminum alloy Reflektor: convex lens. Battery: 1 AA battery (included). Size: 9.4 x 2.5 cm. Weight: 55 g. Use: Black light reveals phosphorus - a substance that emits visible light due to radiation. Because it cannot be seen with the naked eye, we need help to dissolve it. Black light allows this. Package contents: 1 x 365 SK68 UV flashlight. At DARKBEAM we stand firmly behind the craftsmanship of our branded products. We offer friendly, easily accessible support.