UVC Bulb 15 Watt Germicidal Sterilizer 254nm 120V E26. Made with very pure quartz tube for maximum ultra violet light. Operates 120 VAC non dim-able. Uses E26 Edison screw base so it will fit light fixture with out adapters. The output is 15 Watts for good sterilization and germicidal use. Kills Coronavirus, COVID-19, MSRA, MERS, MSRA and other super bugs by breaking down the DNA of the bacterial or virus. Great for living room, baby room, hospital, nursing home. Long life up to 13,000 hours. Built in ballast so you can use in any light fixture that does not dimming. CE and Rohs. All persons and animals must not be in the room when on. WARNING: To guard against injury, basic safety precautions should be observed, including the following: Avoid exposure to direct or reflected germicidal ultraviolet rays. Germicidal ultraviolet rays are harmful to the eyes and skin. M..O.L. is 6 5/8" and diameter is 1.965". Please see attachment for UVC certification. CE and Rohs. The measurements are at 1 meter on the specification page.