This Feit Electric 50 W equivalent MR16 low-voltage flood LED light bulb has a GU5.3 base. Featuring energizing daylight light 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 and uses less energy than a standard 50 W incandescent light bulb. The dimmable lights have an average life of 25,000 hr/22.8 years and are safe for indoor or outside use. Choose a dependable high-quality 12 V MR16 bulb for residential or commercial applications.