Halogen bulb, referred to as halogen bubble or halogen lamp, also known as tungsten halogen bulb, quartz bulb, is a variant of incandescent lamp.
The principle is in the bulb into iodine or bromine and other halogen gas, at high temperatures, sublimation of tungsten wire and halogen for chemical action, after cooling the tungsten will re-solidification in the tungsten wire to form a balanced cycle to avoid tungsten wire premature rupture The So halogen bulbs live longer than incandescent lamps.
Halogen lamp power supply voltage is usually divided into AC 220V and DC 12V two.
All incandescent light principle is the use of objects by the principle of heat and light radiation to achieve the principle of heat, the most simple incandescent lamp is to open enough current to the filament, filament fever to incandescent state, it will issue a bright, but this incandescent The life of the lamp will be quite quite short.
Halogen bulb and other incandescent lamp is the biggest difference is that the halogen lamp glass shell filled with some halogen element gas (usually iodine or bromine), its working principle: when the filament fever, the tungsten atoms are evaporated to the As the glass tube wall moves, the tungsten vapor is cooled to about 800 ° C and is combined with the halogen atom to form tungsten halide (tungsten iodide or tungsten bromide) when approaching the glass tube wall. The tungsten halide continues to move toward the center of the glass tube and returns to the oxidized filament. Since the tungsten halide is a very unstable compound, it is re-decomposed into halogen vapor and tungsten after heat, On the deposition down, make up the part that has been evaporated. Through this regeneration cycle, the service life of the filament is not only greatly extended (almost four times that of incandescent), but also because the filament can work at higher temperatures, resulting in higher brightness, higher color temperature Higher luminous efficiency.
Halogen lamps are made of tungsten filament, but are wrapped in a smaller quartz glass. Because the glass from the filament is very close, if it is made of glass it will be easy to melt. The gas in the bulb consists of different groups of halogen lamps. These gases have a very interesting feature: they are combined with tungsten vapor. If the temperature is not high enough, the halogen gas combines the tungsten atoms to evaporate and re-deposited on the filament. This cycle of the process, so that filament continued a lot of time. In addition, it can run hot filament, which means you get more light energy. You still get a lot of heat, but because the quartz glass is so close to the filament, it is hotter than a normal light bulb.
Halogen bulbs can also operate at higher temperatures than conventional incandescent lamps, and their brightness and efficiency are higher. However, at this temperature, ordinary glass may soften, so halogen bulbs need to use a higher melting point of quartz glass. And because the quartz glass can not block the UV, so the halogen bulbs are usually and need to use another UV filter.
Halogen bulb on the crystal glass if there is oil, will cause the glass on the different temperature, reduce the lamp life. So when you change the halogen bulb to avoid touching the glass bulb. If the fingers touch should be alcohol clean.
Halogen lamp began to apply to the body began in the 1970s, its luminous principle and ordinary incandescent lamp is very similar to the halogen lamp tungsten wire has a higher melting point than ordinary incandescent, so the brightness of the halogen lamp is greater than incandescent.
Xenon bulbs have three times higher than ordinary halogen bulb light intensity, energy consumption is only two-thirds; xenon bulbs and sunlight with almost the same light color for the driver to create better visual conditions. Xenon lamps make lighting a wider range of light intensity, greatly improving the safety and comfort of driving.
Many cars are using traditional halogen bulbs, and traffic accidents occur more than 60% are concentrated in the night or when the weather is poor, halogen bulbs in the night or when the weather is poor when the lighting effect will be greatly reduced, at this time, driving The vision has been seriously affected, easy to produce fatigue, distracted, etc., the probability of traffic accidents doubled. At this time to improve the performance of the light is very urgent, in the ordinary headlamps can not meet our needs, we will seek higher brightness, longer life of the lighting system, so the market so-called ultra-white, super light And other products also came into being, and xenon headlamps is one of them.