JCRM MR11 halogen light bulbs are used widely in many different types of lighting applications. You'll find them in specialty fixtures including bubblers, fiber optic types for special occasions. You'll find our MR11 lamps ideal for any kind of display or for use in a home lighting situation. The rendering of light and shadow produces a dramatic effect. These are smaller than MR16 lamps and have a 1.4 inch reflector opening. They also have a G4 base which is 2 pins set at 4mm apart.