PAR is also a unit of bulb measurement. In this system of lamp identification the first number listed denotes the maximum diameter of the lamp expressed as a number of 1/8's of an inch. For example, some common sizes are:

PAR-64's (8") ;PAR-56 (7");PAR-46 (5.75");PAR-38 (4.75");PAR-36 (4.5")

All of our bulbs currently are “medium” or “Edison” base; which means they will fit into most sockets in the US.

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