High-intensity discharge lamp

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High-intensity discharge lamp

A lamp that produces light by passing an electrical current through a gas or vapor under high pressure. HID lamps have a long life and consume little energy to produce a great amount of light. However, they distort the color rendition of objects and are used mostly as ambient lighting for commercial interiors. Ballasts are required to start the lamp. Types include mercury vapor lamps, metal-halide lamps, and sodium vapor lamps. The different types contain different gases, which produce different colors of light.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

high-intensity discharge lamp

One of a group of mercury, metal halide, or high-pressure sodium lamps.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
High-pressure sodium (HPS) -- a high-intensity discharge lamp that uses sodium under high pressure as the primary light-producing element.
Fluorescent and other high-intensity discharge lamps may also be brought to the collections.
The report does not include analysis of any other type of lighting system, such as high-intensity discharge lamps or incandescent bulbs.
IIHS focused on the issue as automakers shift to LED or high-intensity discharge lamps for headlights instead of traditional halogen lamps, and use new technology for curve-adaptive headlights that turn based on the direction of the wheels.
Two-dimensional streaming flows in high-intensity discharge lamps. Phys Fluids.
Previously, the facility used 400-Watt high-intensity discharge lamps, which were upgraded to the Digital Lumens 10,000-lumen intelligent LED fixtures with integrated occupancy sensors in every fixture.
Lamp technology changed over the years from fluorescent T12 to T8 and high-intensity discharge lamps to more efficient types of HID (ceramic metal halide for example).
Tibbetts: All fluorescent and most high-intensity discharge lamps contain a small amount of mercury, a naturally occurring element necessary for the energy-saving attributes of these lamps.
According to the Commission, savings under the first measure for fluorescent lamps, high-intensity discharge lamps and related ballasts and luminaires could be up to 15% of the equipment's current usage.
The system uses powerful, high-intensity discharge lamps to flood the inspection zone with light.

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