Metal Halide Lamp Construction And Working

When full voltage is applied across the main electrodes no arc is produced at the time of switching.

Metal halide lamp construction and working.

A halogen is a monovalent element which readily forms negative ions. Ignitor a device either by itself or in association with other components that generates voltage pulses to start discharge lamps. The auxiliary electrode or starter electrode near the main electrodes attached to the glass stem creates initial discharge between them. 1 how it works.

Schematic diagram of a metal halide lamp is shown below. The content of video will be iti level. There is a time delay of at least two to four minutes after starting before lamps reach full light output. The basis for the metal halide lamp starts all the way back in 1912.

Steinmetz was the first person to take a mercury vapor lamp and use halide salts in an attempt to produce a better light color. How does a metal halide lamp work. A metal halide 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 it is a type of high intensity discharge hid gas discharge lamp. This group includes the mercury vapor high pressure sodium and metal halide lamps.

History of the metal halide lamp. Developed in the 1960s they are similar to mercury vapor lamps but contain additional metal halide compounds in the quartz arc tube. A halide is a chemical compound of a halogen combined with an electropositive element or in the case of lamps. Probe start metal halide lamps will start at an ambient temperature of 30 c 22 f or higher.

Like fluorescent lamps hid lamps produce light by the excitation of a gas confined between a pair of electrodes and require a ballast to limit current draw and to provide proper starting and operating voltages. 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. Metal halide high pressure sodium and mercury vapor are types of hid lamps. Capacitor a device used in electric circuitry to temporarily store electrical charge in the form of an electrostatic field.

Detailed vdo about metal halide lamps its construction working and advantages all are discussed in detail. The basic construction of the lamp is two envelopes an inner envelope arc tube which contains the arc and the outer envelope called bulb which filters out the uv and shields the inner arc tube.