Features: 1) Watt: 4W (G5), 6W (G5), 8W (G5), 10W (G13), 15W (G13), 20W (G13), 22W (G10q), 2) Lamp working voltage: 28V, 42V, 56V, 45V, 56V, 60V, 62V 3) Wave length (NM): 254 4) Life: 5000h 5) Used with a starter in 220V 50Hz electricity 6) Application: killing or inactivating bacteria, viruses and other primitive organism air, water and surface disinfection in hospitals, bacteriological research and pharmaceutical environments, and food processing industries such as dairies, breweries and bakeries, disinfection of drinking water, wasted water, swimming pools, air conditioning systems, cold storage rooms, packing materials 7) Used in a variety of photochemical processes Packing: 1pc/sleeve 25pcs/carton