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"40" sticker—400 watts (MV/MH/HPS/PSMH)—Very common "No" sticker [clarification needed] —600 watts (MH/HPS)—Lamps for commercial or industrial lighting are so rare that there isn’t any NEMA sticker. Most 600 watt HPS lamps are used for growing. "70" sticker—700 watts (MV)—Very uncommon "75" sticker—750 watts (HPS/PSMH)—Uncommon
A high-pressure sodium street light in Toronto A high-pressure sodium-vapor lamp An HPS lamp that isn't entirely off. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure, and high pressure.
Group 2 (Only for use in signalling lamps, cornering lamps, reversing lamps and rear registration plate lamps) Category Cap (Base) Filaments Nominal Power (Major/Minor where applicable) Comments Image C5W SV8.5 1 6 V, 12 V, 24 V: 5 W [5] ECE nominal luminous flux: 45 lm ± 20%; Old designation: C11, common name is "festoon" base H6W BAX9s 1 12 ...
Like other gas-discharge lamps such as the very-similar mercury-vapor lamps, metal-halide lamps produce light by ionizing a mixture of gases in an electric arc.In a metal-halide lamp, the compact arc tube contains a mixture of argon or xenon, mercury, and a variety of metal halides, such as sodium iodide and scandium iodide. [7]
For example, a PAR16 lamp is approximately 2 inches or 50.8 mm in diameter. [1] The size of rectangular PAR lamps is expressed as the letters REC followed by the reflector's mouth height, the letter "X", and the reflector's mouth width—with both dimensions in millimeters. For example, REC142X200 lamps are 142 high and 200 mm wide. [2] [3]
Streetlamp with a ceramic metal halide bulb Ceramic metal halide bulb with G12 socket. A ceramic metal-halide lamp (CMH), also generically known as a ceramic discharge metal-halide (CDM) lamp, [1] is a type of metal-halide lamp that is 10–20% more efficient than the traditional quartz metal halide [2] and produces a superior color rendition (80-96 CRI).