PL-S Blacklight Blue is a special low-wattage compact fluorescent lamp emitting long wave UV radiation for detection and analysis purposes in archaeology, money checking, forensic science, food industry, medicine, mineralogy, philately as well for special effects in night clubs, discos, theatres and sign lighting. The 2-pin version is designed for operation on electromagnetic gear, the 4-pin version is designed for operation on electronic gear. Both versions are provided with a plug-in/pull-out lamp base.