This miniature fluorescent lamp (tube diameter is only 16 mm) is made of dark blue glass, which transmits UVA radiation and almost completely blocks visible light. As a result, it is perfect for the rapid detection of UV reflective materials. It is most often used in such fields as criminology, philately or medicine. It facilitates activities related to analysis, testing or control. It is also suitable in the entertainment industry (clubs, theaters) to obtain the so-called. special effects.