High-Intensity Discharge (HID) Lamps
HID lamps encompass steel halide, high-pressure sodium, and mercury vapor lamps. They perform by using passing an electric powered current through a gas or a aggregate of gases and steel salts, generating extreme mild appropriate for outside and business programs.
Features of HID Lamps
- High Luminous Efficacy: HID lamps generate a large quantity of light per watt, and for this reason have high luminous efficacy.
- Longer Lifespan: Compared to incandescent bulbs, these lamps have a longer lifetimes. They are suitable for packages where frequent replacement is impractical.
- Wide Range of Applications: HID lamps are used in many devices: street lighting fixtures, sports arenas and business centers.
- Color Rendering: Metal halide HID lamps have good color rendering so they are suitable for those environments in which accurate color replication is important.
- High Output and Brightness: Humanizing the sentence: As they produce extreme, concentrated light output HID lamps are well suited to high-ceiling spaces and outdoor lighting fixtures.
Circuit Diagram of HID Lamps
HID lamps require a ballast as properly, and the circuit is more complicated than that of fluorescent lamps. The ballast is designed to offer the vital voltage and current regulation.
Advantages of HID Lamps
- High Luminous Efficiency: HID lamps with metal halide produce a large quantity of light per unit electrical energy, and so are green.
- Applications in Large Spaces: Can be particularly applicable for use outside and in large inside areas where high-intensity lighting fixtures is demanded, such as sports arenas or commercial facilities.
- Good Color Rendering: Suitable colour rendering is also important on packages, and metal halide lamps are frequently used for this.
- Longer Lifespan: Another way to reduce upkeep costs is through the replacement of incandescent bulbs with HID lamps, which have a longer lifecycle.
- Versatility: For flexibility in lighting systems, HID lamps come in a variety of types made for various applications.
Disadvantages of HID Lamps
- Warm-Up Time: However, some HID lamps have a heat-up time before they get to full brightness. In certain applications this can be an undesirable trait.
- Complex Ballast Requirements: HID lamps, with the addition of extra complicated ballast structures add to both cost and preservation complexity.
- UV Emission: Because high-intensity discharge lamps, especially metal halide ones already emit ultraviolet (UV) radiation, UV blocking substances are added in some packages.
What is Discharge Lamp?
Artificial light lamps using electrical discharge as a means of artificial illumination constitute an important break-through. Discharge lamps are dependable, economic and long lasting forms of lighting equipment. The operation of these lamps is based upon the movement of an electric current through a vaporous gas in a closed chamber to cause the atoms or molecules therein to flash.
For instance, the fluorescent lamp is composed of mercury vapor plus phosphor coatings encapsulated in a glass tube. When the electric current passes through, it produces ultraviolet radiation which in turn causes an electron excitation of a phosphor. Another type utilizing gas-discharge lighting for high efficiency, predominantly found outdoors or in factories and workshops is the HID (high-intensity discharge) lamp which comes across a range of different types–from metal halide to high pressure sodium lamps.
Table of Content
- What is Discharge Lamp?
- Working of Discharge Lamp
- Types of Discharge Lamp
- Fluorescent Lamp
- High-Intensity Discharge (HID) Lamps
- Neon Lamp
- Characteristics of Discharge Lamp