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.

high-intensity discharge lamp

One of a group of mercury, metal halide, or high-pressure sodium lamps.
References in periodicals archive ?
Metrolight- Positive - Efficient Building Systems As a developer of energy-efficient, networked lighting control systems that enable up to 70% energy savings, Metrolight is well-positioned to serve both the incumbent high-intensity discharge lamp and the emerging LED market for industrial and street lighting applications.
Intertek examined and tested the UNIDIM ballasts, and found them to be in compliance with UL-1029, 1994 Edition, the standard for high-intensity discharge lamp ballasts.
Two-dimensional streaming flows in high-intensity discharge lamps.
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).
For headlamp applications, one solution could be more widespread use of high-intensity discharge lamps, since they need a higher voltage anyway.
The issue centers around the fact that fluorescent and high-intensity discharge lamps contain a small quantity of mercury.
Quantitative x-ray absorption imaging with a broadband source: Application to high-intensity discharge lamps.
While mercury switches have virtually disappeared from convenience lighting applications in cars, the use of mercury is increasing in applications such as high-intensity discharge lamps and backlighting applications in instrument panels.
High-Intensity Discharge lamps include High Pressure-Sodium, Mercury Vapor, and Metal Halide lamps.
At present, energy savings based on conventional lighting technologies include compact fluorescent lamps (CFLs) with integrated electronics, advanced linear fluorescent lamps, halogen energy-saving lamps (HES) and high-intensity discharge lamps, together with advanced control gear and light management systems.

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