Long-Wave Ultraviolet Pen Light

This pocket-sized pen light produces long-wave UV light ideal for fluorescence-testing gemstones. Tuck the light conveniently (and discreetly) in a pocket, sample case, display case or pencil cup; the built-in clip helps keep the light in place in a pocket or on a shop coat or apron. The light is powered by a single AAA battery (not included).