metal-halide lamp

There are lights for night play using metal-halide lamps on eight towers.

At the end of life, metal-halide lamps exhibit a phenomenon known as cycling.

Its light source is a metal-halide lamp.

Metal-halide lamps consist of an arc tube with electrodes, an outer bulb, and a base.

Metal-halide lamps are used because they output an ideal color temperature and a broad spectrum of color.

Since a metal-halide lamp contains gases at a significant high pressure, failure of the arc tube is inevitably a violent event.

Metal-halide lamps are used both for general lighting purposes both indoors and outdoors, automotive and specialty applications.

These are usually referred as ceramic metal-halide lamps or CMH lamps.

Dysprosium iodide and dysprosium bromide are used in high intensity Metal-halide lamps.

Xenon headlamps in automobiles actually use metal-halide lamps where xenon arc is only used during start-up.

Although it is impossible to predict or eliminate the risk of a metal-halide lamp exploding, there are several precautions that can reduce the risk:

Because of the whiter and more natural light generated, metal-halide lamps were initially preferred to the bluish mercury vapor lamps.

Automotive HID may be called "xenon headlamps", though they are actually metal-halide lamps that contain xenon gas.

Like other gas-discharge lamps such as the very-similar mercury-vapor lamps, metal-halide lamps produce light by making an electric arc in a mixture of gases.

As of 2012 several companies started to offer self-ballasted metal-halide lamps as a direct replacement for incandescent and self-ballasted mercury-vapor lamps.

Like self-ballasted mercury-vapor lamps, self-ballasted metal-halide lamps are connected directly to mains power and do not require an external ballast.

The usage of argon, as is commonly done in street lights and other stationary metal-halide lamp applications, causes lamps to take several minutes to reach their full output.

ETC also manufactures an HID (high-intensity discharge) Source Four with a metal-halide lamp.

These are actually metal-halide lamps; the xenon gas is used only to provide some light immediately upon lamp startup, as required for safety in an automotive headlamp application.

For metal-halide lamps, during start-up, the lamp is "ignited" by a 5000 Volt pulse from a current-regulating ballast to initiate an arc between two electrodes in the quartz tube.

The color temperature of a metal-halide lamp can also be affected by the electrical characteristics of the electrical system powering the bulb and manufacturing variances in the bulb itself.

About 24% of the energy used by metal-halide lamps produces light (an efficacy of 65-115 lm/W), making them substantially more efficient than incandescent bulbs, which typically have efficiencies in the range 2-4%.

The electric arc in metal-halide lamps, as in all gas discharge lamps has a negative resistance property; meaning that as the current through the bulb increases, the voltage across it decreases.

A "cold" (below operating temperature) metal-halide lamp cannot immediately begin producing its full light capacity because the temperature and pressure in the inner arc chamber require time to reach full operating levels.

Most newer generation electronic ballasts can operate both high pressure sodium (HPS) lamps as well as metal-halide lamps, reducing costs for building managers who use both types of lamps.