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ANSI/NEMA C78.79-2014 (S2025)
Electric Lamps - Nomenclature for Envelope Shapes Intended for Use with Electric Lamps
Describes a system of nomenclature that provides designations for envelope shapes used for all electric lamps. The purpose is to include solid state light sources that are functional applications of traditional lamps.
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NEMA: National Electrical Manufacturers Association [nema]