Metallihalidilamppuja

Metallihalidilamppuja is a Finnish term referring to metal halide lamps. These are a type of high-intensity discharge (HID) lamp that produces light by passing an electric arc through a gaseous mixture. This mixture typically contains mercury vapor, metal halides, and possibly other halogens. When the lamp is energized, the arc heats the mercury vapor, which then emits ultraviolet (UV) radiation. This UV radiation excites the metal halide compounds, causing them to vaporize and emit visible light.

The color and intensity of the light emitted by a metal halide lamp depend on the specific metal halides used in its composition. Common metal halides include sodium iodide, thallium iodide, and scandium iodide. By adjusting the proportions of these compounds, manufacturers can tune the lamp's color temperature and spectral output to suit various applications.

Metal halide lamps are known for their high luminous efficacy, meaning they produce a lot of light for the amount of electrical energy consumed. They also offer excellent color rendering, making them suitable for applications where accurate color perception is important. However, they require a ballast to regulate the current and voltage, and they have a warm-up period before reaching full brightness. Their lifespan is generally shorter than that of some other lighting technologies, but longer than incandescent bulbs.

Due to their bright, white light and good color rendering, metal halide lamps are commonly used in applications such as stadium lighting, street lighting, large indoor spaces like warehouses and gymnasiums, and in horticultural lighting for plant growth. They are also used in some specialized applications like automotive headlights and stage lighting.