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ANSI C136.16-2019
Roadway and Area Lighting Equipment - Enclosed Post Top-Mounted Luminaires
Covers dimensional, maintenance, and light distribution features that permit the interchange of enclosed, post top–mounted high-intensity discharge (HID), solid state light (SSL) source (also referred to as LED (Light Emitting Diode), compact fluorescent, and induction luminaires whose center of mass is approximately over the mounting tenon.
NEMA: National Electrical Manufacturers Association [nema]