Knowledge Base

    What do the letters on my light mean?

    Grote's Answer

    Most of the lamps you purchase today will have lettering on them that doesn’t seem to make any sense. This lettering is the “SAE” identification code. The Society of Automotive Engineers has been committed to improving the effectiveness and safety of your vehicles lighting. They have developed a uniform identification code that is being used by all reputable manufacturers. The code can be found in SAE J759 JUN2001 – Lighting Identification Code.

    Here is an example of a code you may see on a light:

    SAE = Indicates lamp has been designed to SAE specifications as indicated by the following letter codes.

    A = Reflex Reflector, I = Turn signal, S = Stop Lamp, T = Tail lamp. 75 = the year lamp was certified.

    DOT Indicates lamp has been tested and conforms to DOT Required Specifications, but does not indicate that the Department of Transportation or NHTSA has approved the lamp.

    Please see our SAE Lighting Identification Codes page for more info.

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    Updated Sep 22, 2014

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