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ANSI ANSLG C78.357-2010
Incandescent lamps - Tungsten Halogen Lamps (non-vehicle)
Specifies performance requirements for various single-ended, double-ended, integral reflector, and PAR tungsten halogen lamps, with rated voltages up to 277 V, and used for projection, photographic, (floodlight), special purpose, general lighting service (GLS), and stage-studio lighting applications.
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NEMA: National Electrical Manufacturers Association [nema]