MultiFaceted Reflector (MR) 11 LED bulbs control light more precisely. They produce about four times the concentrated light intensity of general service A shape incandescents. Like all light bulbs, the 11 value represents the diameter of the bulb in 11⁄8 of an inch. Therefore, MR 11 is 1.38 inches in diameter.
LED MR11 light bulbs are designed to replace traditional halogen bulbs with a more energy-efficient solution that is long lasting. These LEDs also give you more flexibility when it comes to color temperature. Unlike halogen models that only offered 3000K color temperatures, MR11 LED bulbs have multiple color temperatures available that range from 2700K to 5000K, which gives you the freedom to choose how warm or bright your light output will be.