MR8/MR-8 is the designation for a mirrored (multi-faceted) reflector (MR) light bulb which has multiple small facets, the number eight (8) following the MR designates the outer diameter of the reflector across the rim in eights (1/8") of an inch. Thus the outer diameter of the MR8/MR-8 eight eighths of an inch or one inch. MR8/MR-8 (multifaceted reflector) bulbs commonly come with G4/GU-4/GZ-4 base configurations and are rated between 6 and 12 Volts and range in wattage between five (5) and thirty-five (35) watts. MR-8/MR8 bulbs are commonly used in holiday decorations and as fiber-optic light sources.
