TL Miniature lamp (tube diameter 16 mm) is made of blacklight blue (dark blue) glass, which transmits UV-A radiation, but gives only a minimum of visible light. It is a perfect solution for quick detection of UV-reflecting materials. Mainly used in testing, inspection and analysis in various branches of industry, e.g. criminology, philately and medicine. Also Used in creating special effects in the entertainment industry, e.g. in nightclubs and theaters.