High-Intensity Discharge Lamp

High-Intensity Discharge Lamp
  A lamp that consists of a sealed arc tube inside a glass envelope, or outer jacket. The inner arc tube is filled with elements that emit light when ionized by electric current. A ballast is required to provide the proper starting voltage and to regulate current during operation.

Energy terms . 2014.

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  • High-intensity discharge lamp — A High intensity discharge (HID) lamp is a type of electrical lamp which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina tube. This tube is filled… …   Wikipedia

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  • High-intensity discharge (HID) lamp —   A lamp that produces light by passing electricity through gas, which causes the gas to glow. Examples of HID lamps are mercury vapor lamps, metal halide lamps, and high pressure sodium lamps. HID lamps have extremely long life and emit far more …   Energy terms

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  • Hydrargyrum medium-arc iodide lamp — Hydrargyrum medium arc iodide, or HMI, is a mercury halide gas discharge medium arc length lamp with a multi line spectra emission. The name implies that hydrargyrum, an archaic term for Mercury (Hg), is held as a vapour mixed with other rare… …   Wikipedia

  • Metal halide lamp —   A high intensity discharge lamp type that uses mercury and several halide additives as light producing elements. These lights have the best Color Rendition Index (CRI) of the high intensity discharge lamps. They can be used for commercial… …   Energy terms

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  • lamp — lampless, adj. /lamp/, n. 1. any of various devices furnishing artificial light, as by electricity or gas. Cf. fluorescent lamp, incandescent lamp. 2. a container for an inflammable liquid, as oil, which is burned at a wick as a means of… …   Universalium

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