The Philips 624925 is a 18w TUV PL-L Germicidal lamp with a 4-PIN base. This UV-C bulb is specifically designed to kill germs and bacteria, making it ideal for use in areas where sanitation is a crucial concern. With a voltage of 60V, this single tube bulb features a wattage of 18W and is shaped like a 4-PIN base. For residential drinking water, water and air treatment units, stand-alone purifiers and deactivation of bacteria, viruses and other micro-organisms Short-wave UV radiation with a peak at 253.7 nm (UVC) for disinfection purposes Lamp glass filters out the 185 nm ozone-forming radiation Warning sign on lamp indicates that the lamp radiates UVC 2G11, 4-pin Base