There are two types of bases which are commonly used：GU10 and GU5.3.
The “G” base type of bulb is used to designate a “pinned” base.
GU5.3 – “5.3” means that the pin to pin distance is 5.33mm.
GU10 – “10” indicates that the distance between the two pins is 10mm.
Shape & Size
The most popular spotlight shapes are MR11 and MR16.
– “MR” is the abbreviation of multifaceted reflector.
– The number after “MR” stands for the diameter of the bulb’s shape. The diameter of MR11 is 35mm. The diameter of MR16 is 50mm.
There are two colors of spotlight that are widely used: warm white and daylight white.
Comparison of Power Consumption: LED Spotlight vs. Halogen Spotlight