MR16 LED light bulb RGB smoothly transition from one color, MR16 RGB colorful led light bulb replacement, GU5.3 Base, 2.1 watt RGB Color changeing LED spotlights. Using 21 pcs RGB-C Clear TriColor LED (3 different color led inside: Red, Green, Blue for each LED component, See below image, It is 4 pins led), This LED is 5mm through hole LEDs. These RGB LEDs have a wavelength of 472nm for blue, 525nm for green, and 630nm for red, with a millicandela rating of 5,000mcd. They have a 15 degree viewing angle with a clear lens. 50,000 hours Life Time. The color changing is slowly and smoothly. AC/DC 12 volt operation led light bulbs, Just plug it into your 12V AC or DC halogen fixture and start to save on utility bill.