How Does HID Lighting Work?

HID (high intensity discharge) lamps are typically required when high levels of light are needed to cover large areas. They are the lights you see at ballgames and theme parks, at stadiums and in gyms.

There is a high demand for HID lamps because of their efficiency on a wide scale and their ability to clearly cover huge areas. They come in several versions: mercury vapor lamps, metal halide lamps which use metal halide capacitors , and standard high-pressure sodium lights which use high pressure sodium capacitors .

Mercury vapor lamps were the first commercially available high definition lamps (HID). They are swiftly becoming outdated by newer more efficient counterparts like high-pressure sodium lamps and metal halide lamps.

High-pressure sodium lamps which use high pressure sodium capacitors generally emit a more yellowish light, but are available with whiter light. They are usually the most efficient, and thus most commonly used, type of HID light. Metal halide lamps which use metal halide capacitors produce a beautifully white, natural light, but are also less efficient.