This Feit Electric 50W equivalent traditional glass MR16 flood LED light bulb has a GU10 base. Featuring energizing daylight and high 90+ CRI (color rendering index) rating this Enhance LED is our highest quality energy efficient light with bolder color rendering and enhanced contrast so people and objects appear more realistic and vibrant. This MR16 reflector produces a similar light output while using less energy than a standard 50-Watt incandescent light bulb. The dimmable lights have an average life of 25,000-hour/22.8 years and are safe for indoor or outside use. Choose a dependable high quality 120-Volt MR16 bulb for residential or commercial applications.