Spot light is a kind of electric lamp that is widely used in commercial, residential and transportation illumination. PAR has many meanings. It isn’t referring to the golf game when it comes to LED lighting. PAR is a parabolic anodized reflector.
In fact, PAR is the description of the lamp or bulb that goes inside a PAR can. The can is the container where a PAR lamp or bulb goes into, usually made of compound metal.
But what do PAR20, PAR30, PAR38, and PAR56 exactly mean? The number after PAR refers to the maximum diameter of a PAR lamp or bulb. It’s “refers to”, not “equals”. To figure out the exact diameter of a PAR lamp or bulb, you need to divide the number next to PAR by eight.
For example, if you have a PAR56, you should divide 56 by 8 and then you will have a 7-inch diameter bulb. The diameter of a PAR lamp or bulb is very useful when you need to change a PAR bulb.
As long as you know how to do the match, it’s not difficult to figure what are PAR20, PAR30, PAR38, and PAR56 spotlight. PAR20 is a spot light bulb has a 2-1/2″ diameter. PAR30 is a spot light bulb has a 3-3/4″ diameter. PAR38 is a spot light bulb has a 4-3/4″ diameter. PAR56 is a spot light bulb has a 7″ diameter. PAR64 is a spot light bulb.