SAE J572
SAE J572 2011-OCT-01 Requrements for Sealed Lghtng Unt for Constructon and ndustral Machnes-Ths document has been declared "Stablzed" by SAE
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This SAE Standard applies to 145 mm nominal headlamp and floodlamp units.
Purpose—To define the dimensional requirements for sealed lighting units and assure their interchangeability.