EPA Est.No.100578-WA-1, UV sterilizer light is an effective tool for eliminating microorganisms . You can use this UV light bulb for your aquarium, refrigerator, air purifier, micro-wave oven, etc. This UV lamp is perfect for places like, office, school, restaurant and more. Description: Great UV sterilizer lamp tubes generate 254nm UVC rays Used in aquarium, kitchen, bathroom, restaurant, etc Quartz glass tubes, G23 base Overall Length: Approx. 4 inch Watts: 5W Power: 110V / 220V Note: This UV lamp must be used with an external ballast which is not provided here. Package Included: 1x UV Lamp Tube