What Does Car Halogen Lamp Mean?
2 Answers
Car halogen lamp is a type of automotive lighting configuration, also known as tungsten halogen bulb or quartz bulb, which is a variant of incandescent lamps. Halogen bulbs (English: halogen lamp), abbreviated as halogen bulbs or halogen lamps, contain halogen gases such as iodine or bromine inside the bulb. At high temperatures, the sublimated tungsten filament chemically reacts with the halogen, and the cooled tungsten re-solidifies on the filament, forming a balanced cycle to prevent premature filament breakage. The basic light-emitting principle of halogen lamps is the same as that of incandescent lamps: both pass sufficient current through the tungsten filament to heat it to an incandescent state, thereby emitting light. Working principle of halogen lamps: When the tungsten filament heats up, tungsten atoms evaporate. As they approach the glass tube wall, the tungsten vapor cools to about 800°C and combines with halogen atoms to form tungsten halide. Halogen lamps are essentially an upgraded version of incandescent lamps. Unlike incandescent lamps, they contain halogen gases such as iodine or bromine inside the bulb, hence the name "halogen lamp." Due to the presence of halogen gases, the light produced has a darker hue and lower brightness, often referred to as "candlelight." Additionally, since the filament in halogen lamps is made of tungsten, they are also called "tungsten halogen lamps." Advantages of halogen lamps: simple structure, low cost; brightness is easy to control and adjust; good color rendering of light, strong penetration; longer lifespan, higher color temperature, and higher luminous efficiency compared to ordinary incandescent lamps. Disadvantages: Compared to xenon lamps, the luminous efficiency is still low, with most energy lost as heat; lifespan is only one-tenth that of xenon lamps; color temperature is lower than that of xenon lamps. There are four types of car headlights in total: halogen headlights, xenon headlights, LED headlights, and laser headlights. Xenon headlights are commonly used in mid-to-high-end cars. They are brighter than halogen headlights and usually come with lenses to focus the emitted light. Xenon headlights produce white light by stimulating luminescence with high-voltage current, resulting in a very bright color. Xenon headlights have a longer usage cycle and better energy-saving effects. Due to advancements in headlight production technology, the production cost of xenon headlights is much higher than that of halogen headlights. LED headlights have emerged in recent years. When mentioning LED headlights, people often think of LED daytime running lights. LED headlights also offer advantages such as energy efficiency, environmental friendliness, durability, compact size, and instant illumination. Due to structural and cost limitations, they are only suitable for some high-end car models. Laser headlights are a relatively high-end type of headlight, sounding very futuristic. Currently, laser headlights are only equipped on advanced luxury car models. The light-emitting component of laser headlights is a laser diode, and the production cost is very high, making cars with laser headlights very expensive.
I've always thought halogen lights are quite common in cars. Simply put, they add halogen gas inside the bulb to make it brighter and more durable than old-fashioned bulbs. When this light works, the filament burns in the halogen gas, which not only increases brightness but also extends its lifespan significantly, providing better visibility when driving at night. However, its drawbacks are also quite obvious—it consumes more electricity than LEDs and sometimes the filament may burn out due to voltage issues. Compared to modern popular LED headlights, halogen lights are much cheaper in cost and maintenance. I recommend novice car owners to focus on checking whether the lamp cover is clean and the wiring connections are secure during inspections to avoid dust affecting the light output. Additionally, regular bulb replacement is crucial; generally, they need to be replaced every one or two years. If you're doing it yourself, just prepare gloves and standard-sized bulbs to get the job done easily.
