A GU10 is Really an MR16?
March 31st, 2009
A GU10 is really an MR16. Yes, MR16 is the correct name. The difference in what is commonly refered to as MR16 and GU10 is the base. Both of these bulbs are MR16. The Bipin version is an MR16 with a GU5.3 base. The twist lock version is an MR16 with a GU10 base.
Why are these lamps called MR16?
The “MR” stands for Multifaceted Reflector. This refers to the glass reflector that is inside the bulb. It is faceted in order to control the beam of the light.
The “16″ refers to the size of the diameter of the bulb, in eighths-of-an-inch. So an MR16 has 16 eighths diameter, which is 2 inches. An MR11 has 11 eighths diameter, which is 1-3/8 inches.
Do they make MR16 LED lamps that are G5.3 base and 120 volt like they do halogens?
Sorry, GU5.3 base
Mr16s work on 12Volts only whereas Gu10s are high voltage.
Jeff
I haven’t seen any MR16s with a GU5.3 base in 120v.