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High-intensity discharge lamp. High-intensity discharge lamps (HID lamps) are a type of electrical gas-discharge lamp which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina arc tube. [1] This tube is filled with noble gas and often also contains ...
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 [1][2] (compounds of metals with bromine or iodine). It is a type of high-intensity discharge (HID) gas discharge lamp. [1] Developed in the 1960s, they are similar to mercury vapor lamps, [1] but ...
HID Global is an American manufacturer of secure identity products. The company is an independent subsidiary of Assa Abloy , a multinational door and access control conglomerate. [ 2 ] Björn Lidefelt was appointed CEO on 27 January 2020.
Security lighting to prevent intrusions may be counter-productive. Turning off lights halved the number of thefts and burglary in Övertorneå Sweden. [2] [3] A test in West Sussex UK showed that adding all-night lighting in some areas made people there feel safer, although crime rates increased 55% in those areas compared to control areas and to the county as a whole.
Sodium-vapor lamp. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure and high pressure. Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications ...
High-intensity discharge, or HID lights, sometimes referred to as "xenon lights", are modified metal halide lights employing xenon fill gas. Traditional HID lights, such as those used for general lighting, have a long warm-up time. Headlights must provide light very shortly after they are turned on, and the xenon gas serves to reduce warm-up ...
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