What is a PAR light bulb?


Quick Answer

A PAR light bulb is a light with a parabolic aluminized reflector. The name PAR refers to the shape and design of the light bulb.

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Full Answer

PAR light bulbs come in different sizes for lamps. It is measured by its diameter, or the length across the surface of the bulb. When naming a PAR light bulb size, manufacturers use the acronym "PAR," followed by a number that describes the diameter size. The number corresponds to eighths of a inch. Common sizes are PAR16, PAR20 and PAR30. PAR16 measures 16/8 of an inch in diameter, PAR20 measures 20/8, and PAR30 measures 30/8.

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