Metal Halide Lamp Construction And Working

Detailed vdo about metal halide lamps its construction working and advantages all are discussed in detail.

Metal halide lamp construction and working.

The auxiliary electrode or starter electrode near the main electrodes attached to the glass stem creates initial discharge between them. Ignitor a device either by itself or in association with other components that generates voltage pulses to start discharge lamps. The basis for the metal halide lamp starts all the way back in 1912. 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.

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. Developed in the 1960s they are similar to mercury vapor lamps but contain additional metal halide compounds in the quartz arc tube. 1 how it works. Capacitor a device used in electric circuitry to temporarily store electrical charge in the form of an electrostatic field.

Metal halide lamps belong to a family of high intensity discharge hid lamps that includes mercury vapor and sodium vapor lamps. 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. A researcher by the name of charles p. Full light output does not occur immediately when power is applied to any metal halide lamp.

Steinmetz was the first person to take a mercury vapor lamp and use halide salts in an attempt to produce a better light color. History of the metal halide lamp. Metal halide high pressure sodium and mercury vapor are types of hid lamps. This group includes the mercury vapor high pressure sodium and metal halide lamps.

The content of video will be iti level. 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. Schematic diagram of a metal halide lamp is shown below. When full voltage is applied across the main electrodes no arc is produced at the time of switching.

There is a time delay of at least two to four minutes after starting before lamps reach full light output. Probe start metal halide lamps will start at an ambient temperature of 30 c 22 f or higher.