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A label with a PS before the MH (e.g. 17 PSMH) on a MH sticker indicates that the fixture utilizes the newer pulse start technology, which uses different lamps than the older probe start technology. [ 1 ] [ 2 ] New Nema LED Sticker Uses For Led Street Light
As a result, metal-halide lamps have high luminous efficacy of around 75–100 lumens per watt, [2] which is about twice that of mercury vapor lights and 3 to 5 times that of incandescent lights [1] and produce an intense white light. Lamp life is 6,000 to 15,000 hours.
Mercury-vapor lights operate at an internal pressure of around one atmosphere and require special fixtures, as well as an electrical ballast. They also require a warm-up period of four to seven minutes to reach full light output. Mercury-vapor lamps are becoming obsolete due to the higher efficiency and better color balance of metal halide ...
A metal halide bulb produces 60-125 lumens/watt, depending on the wattage of the bulb. [24] They are now being made for digital ballasts in a pulse start version, which have higher electrical efficiency (up to 110 lumens per watt) and faster warmup. [25] One common example of a pulse start metal halide is the ceramic metal halide (CMH).
The efficiency advantage is near fourfold, with approximately 85–108 lumens per watt of electricity. Unlike regular incandescent halogen lamps where a halide gas is used to regenerate the filament and keep the evaporated tungsten from darkening the glass, the mercury vapour and the metal halides in HMI lamps are what emit the light.
By 1997, the company realized its full potential as a leading manufacturer in the emerging market of DMX intelligent stage lighting products with the launch of the MAC 500 and 600. Martin's most prominent product to date is the MAC 2000 moving head fixture.