MR16 bulb holder is G5.3 lamp holder, insert two pins. GU10 refers twisted thin hanging twisted kind of halogen lamp holder. Current halogen MR16 socket, GU10 lamp holder, whether or mr16 lamp holder, can be made high and low pressure, because it has a relationship with the lamps inside the drive. MR16 bulb holder plug is in the shape of two fine pins, GU10 two round pins, MR16 low voltage lightsusually voltage of 12V GU10 for high pressure lamps, usually voltage of 110V or 220V
MR: the multi-faceted reflector (lamp cup), followed by numbers, which means that the lamp cup diameter (unit is 1/8 inch), MR16 bulb holder diameter = 16 × 1/8 = 2 inch ≈ 50mm, MR11 diameter = 11 × 1/8 = 2 inch ≈ 35mm.