A clear glass tube which radiates more than 85% of their energy in UVC spectrum. Mainly used in the sterilization of liquids, air and gases, as well as pond filters, pharmaceutical and UV-C radiation which kills bacteria, viruses, mould spores, algae and other micro-organisms. This lamp must not be used for general lighting. The emitted radiation is harmful to skin and eyes. 103mm is the total length of this lamp.