LED PAR lamps are directional light sources that are often used in track lighting and recessed lighting fixtures. The name "PAR" comes from the fact that these lamps have a parabolic shape, which helps to focus the light in a specific direction. PAR lamps can be identified by their numerical value, which is the diameter in an eighth of an inch. For example, a PAR38 is 38/8's of an inch in Diameter. LED PAR lamps are available in a variety of sizes and shapes, making them a versatile option for both indoor and outdoor lighting applications.