Standard 15W Twin Tube Compact Fluorescent Medium E26 Base Germicidal Bulb (CF15UV/MED) Warning! See Description For Important Safety Notice Please note that germicidal lamps discharge potentially adverse and/or harmful UV-C radiation rays and should be used with caution. They and are not for general lighting purposes and eyes and skin should be protected when operating germicidal lamps. This germicidal CFL bulb has a medium (E26) base and a twin tube shape. It is clear, non-dimmable, has a wattage of 15, a voltage of 120 and is rated for an average life of 7,000 hours. This bulb should not be used in any fixture or application that was not designed for it specifically to prevent exposure to humans or animals.