The PL-S13W/TUV is a 13 watt, 178mm (7 inches) single end 4 pin base 2G-11 compact ultraviolet (UV) lamp. It uses a 4-pin 2G11 base and has a compact design, making it suitable for use in tight spaces or for replacement in existing fixtures. It emits UV light with a wavelength of 254nm which is used for various application such as water and air purification, curing, and sterilization. The lamp has a long life and energy efficiency, it's a cost-effective lighting solution for the UV application.