Hid is a broad term used to describe any lighting system using a gaseous discharge arc lamp in which the gas filled arc tube operates at several times normal atmospheric pressure compared to the near vacuum conditions in fluorescent lamps. A metalhalide lamp is an electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides compounds of metals with bromine or iodine. Mercury vapor, high pressure sodium, quartz metal halide, pulse start quartz metal halide, and ceramic metal halide. Wo2010082144a1 ceramic gas discharge metal halide lamp. The lamp uses mercury vapor to create the powerful light like the high pressure mercury vapor but includes other metals halide salts to improve the color a halide is a chemical compound of a halogen combined with an electropositive element, or in the case of lamps. Philips lighting company lamp material data sheet lmds.
Transport processes in metal halide gas discharge lamps. Metal halide lamps and highpressure sodium vapor lamps both belong to a group referred to as highpressure discharge lamps. It is a type of highintensity discharge hid gas discharge lamp. Low prices and fast shipping on plusrite hid lamps at. Safety data sheet metal halide lamps osram sylvania. The arc tube may be made of either quartz or ceramic and contains a. The ceramic discharge metalhalide cdm lamp, often referred to as ceramic metal halide lamp cmh is a source of light that is a type of metalhalide lamp which is 1020% more efficient. Hid lamps are similar to fluorescent lamps in that they are gas discharge lamps. Developed in the 1960s, they are similar to mercury vapor lamps, but contain additional metal halide compounds in the quartz arc tube. Gasdischarge lamps are a family of artificial light sources that generate light by.
Office of energy efficiency and renewable energy u. The lamp uses mercury vapor to create the powerful light like the high pressure mercury vapor but includes other metals halide salts to improve the color a halide is a. The temperature of the layer, during operation of the lamp, is. Traditional quartz mh arc tubes are similar in shape to mercury vapor mv arc tubes, but they. These additives enable the lamp to produce more visible light per watt with improved color rendition. Metal halide lamps can be constructed of an outer glass bulb with an internal arctube. The arc tube, made from quartz glass or ceramic materials is located within the jacket of the lamp and contains electrodes at either end of the tube. A new breed of highpressure sodium retrofit lamps has evolved utilizing the best of highpressure sodium and metal halide technologies. The mix of mercury vapor and metal halide molecules in an mh bulb emits a fairly uniform white color. Wattages range from 32 to 2,000, offering a wide range of indoor and outdoor.
Metal halide lamps instructions for the use and application. Atlas catalog magnetic hid ballasts 71 philips advance hid ballasts are available to operate the wide variety of metal halide, high pressure sodium and low pressure sodium lamps available in. Pulse start metal halide construction in the 1980s, metal halide lamps were typically 175 watts and lower but with technology and the use of electronics, lamp designers began to look into. Hid is a broad term used to describe any lighting system using a gaseous discharge arc lamp in which the gasfilled arc tube operates at several times normal atmospheric pressure compared. Metal halide arctubes operate at high pressure and at very high.
A metalhalide lamp is a type of highintensity gas discharge electric lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides. Best seller philips 400watt ed37 hid switch start metal halide high intensity discharge light bulb. Sodium, quartz metal halide, and ceramic metal halide hid lamps in the market today. Ballast circuit for metal halide lamp general electric. In discharge lamps, light is generated by a gas discharge. Metal halide lamps are similar to mercury vapor lamps but use metal halide additives inside the arc tube along with the mercury and argon. Metal halide discharge lamps are coated on the external surface of the discharge vessel 2 with oxides of titanium or cerium 9. If the arc tube ruptures for any reason, the outer bulb may break. The cataphoretic transport of metal ions in low wattage gas discharge lamps of the metal halide type may also occur for the operation of such lamps with a direct current. Sox low pressure sodium vapor philips soxlowpressuresodiumlampsbis33616. Discharge lamps generate electromagnetic radiation by means of an electric current passing through a gas or metal vapor. Enclosed metal halide luminaires must comply with ul. The arc tube may be made of either quartz or ceramic and contains a starting gas usually argon, mercury, and mh salts. Metal halide mh lamps consist of an arc tube also called a discharge tube or burner within an outer envelope, or bulb.
Shop for plusrite 03201578 320watt metal halide bulb. Many metal halide lamps require an enclosed metal halide luminaire designed to contain particles in the event of an arc tube rupture. Transport processes in metal halide gas discharge lamps w. High intensity discharge lighting technology workshop report november 15, 2005 washington, dc prepared for. The various types of hid lamps are categorized and named by the type of gas contained within the arc tube. These lamps consist of a small fused quartz or ceramic arc tube that contains the gases and the arc, enclosed inside a larger glass bulb. Theres a moreorless standard blend of molecules, so the color you get from one mh.
Resources for safety data sheets sds general lamps. Gasdischarge lamps are a family of artificial light sources that generate light by sending an electrical discharge through an ionized gas. General purpose metal halide lamps product offering wattage bulb shape finish 175 ed28 clear, coated 250 ed28 clear, coated 400 ed37 clear, coated bt56 clear, coated 1500. Metal halide universal operating ovoid metal halide gas discharge lamps offer good luminous efficacy, good colour rendering and reliable long life. Metal halide lamps metal halide lamps are similar to mercury vapor lamps but use metal halide additives inside the arc tube along with the mercury and argon. In contrast to what happens in lowpressure discharge, the. Emarc lamps are comparable to metal halide sources in luminous efficacy but with 2 times to 5 times the life.
High intensity discharge lamps describes a family of lamps of which metal halide lamps are a member. A ceramic gas discharge metal halide cdm lamp 23 exhibiting a high color temperature above 4500k has a prolate spheroidshaped pca discharge vessel 12 containing a fill of an inert. According to wikipedia, high intensity discharge hid lighting is a type of electrical gasdischarge lamp that produces light by means of an electric arc between tungsten electrodes. In discharge lamps, light is generated by a gas discharge of particles created between two hermetically sealed electrodes in an arc tube. Ep0628987a2 metal halide discharge lamp and method of. An2747 application note 250 w hid metal halide electronic ballast introduction this application note describes the two stages of electronic ballast for a 250 w hid metal halide lamp. Understanding the characteristics of fluorescent and hid lamps makes it easier to recognize problems and simplifies corrective maintenance. A correlated color temperature like that of xenon at 6000k, with very small arc. Like other gas discharge lamps, these types require a special fixture and ballast for each type and wattage. Box 80020, 5600jm, eindhoven, the netherlands abstract. But knowing that the lamp is a metal halide is not enough to determine the exposures. Metal halide lamp is special type of arc discharge lamp that works on the arc stream via some iodide salts along with argon gas and mercury. This radiation is discrete, as opposed to the continuous radiation.
High intensity discharge ballasts 52 philips advance hid ballasts are available to operate the wide variety of metal halide, high pressure sodium and low pressure sodium lamps. Breakdown characteristics of metal halide plasma lamps. Low pressure discharge lamps include fluorescent lamps and compact fluorescent lamps. High intensity discharge hid lamps high intensity discharge hid3 is the term commonly used for several types of lamps, including metal halide, high pressure sodium, and mercury vapor.
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