How to choose lamps for car headlights. Incandescent bulbs, halogen lights and xenon

The correct choice of lamps for the vehicle will depend on the comfort and safety of machine control in the dark and in the conditions of insufficient visibility.

2015-11-16 19:10:47 42

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The correct choice of lamps for the vehicle will depend on the comfort and security of steering in the dark and in poor visibility conditions.

incandescent Lamp

The history of the lamp bulbs for car headlight began with conventional incandescent bulbs. However, why the story? They are still standing in the headlights of old cars, especially the domestic auto industry. Being a smaller analogue of an ordinary household incandescent lamps, they have low efficiency, because approximately 90% of the energy of the heated tungsten filament is released in the form of thermal radiation and only 10% goes towards producing light. Tungsten evaporates from the filament during lamp operation, is deposited on the glass of her bulb, which, over time, the bulb becomes dark and dull, letting less light out. And incandescent lamp, or rather, their tungsten filaments despite continuous improvement of their design, very sensitive to shock, jolts and vibrations, so their lifetime is very rarely up to 1000 hours. The only advantage of the classic automotive incandescent lamps is their low cost compared with their more advanced counterparts.

Halogen lamp

Conventional incandescent lamps, constantly improving, has created a new class of lamps – halogen. The filament, like predecessors, were of tungsten and the inner portion of the bulb is filled with pairs of the halide of iodine or bromine. The mission of evaporating under the influence of high temperature the tungsten atoms back on the filament, increasing the operating temperature of the spiral and the power of the light bulb. Because the halogen lamp in the process, become very hot, they usually consist of two flasks, allowing you to kill two birds with one stone – to reduce the external temperature of the lamp and significantly improve the efficiency of the halogen cycle recovery of tungsten filament. On the bulb IRC-halogen lamps is applied to a special coating, retarding and reflecting back to the spiral thermal infrared radiation, significantly increasing the performance of the lamp. Galogenok efficiency is about 60%. Halogen lamps are more expensive than conventional incandescent bulbs by about ten times, but they give almost twice more light, and their lifespan reaches 2000 hours. The flask lamps is very sensitive to moisture and dirt in the form of fingerprints. Grease particles remaining on the surface of the flask from contact with bare hand, burn quickly and leave the glass on the black spots, which is an increase of temperature of local parts of the bulb, ending with her destruction. So take the hands of the halogen lamp is possible only through a clean cloth or clean hands protect gloves.

Xenon lamp

Speaking of xenon lamps, it is necessary to distinguish between the xenon-filled lamp, and, in fact, xenon. The first is an analogue of halogen incandescent lamps in which the bulb is filled with halogen-free noble gas xenon. The latter are a new generation of light sources, they are next and will be discussed. Xenon lamp is a gas – discharge bulb filled with mercury vapor and xenon, which is placed inside two electrodes. When applying to the electrodes a high voltage, between them there is a strong electromagnetic field, the ionization of gas particles and between the electrodes of an electric arc emitting a powerful stream of light. Be sure to xenon lamp equipped with a ballast – a ballast that generates a voltage of 25000 In order for the formation of the electric arc and subsequently supporting its combustion at a voltage of 85 V. the ballast is the expensive part hid xenon lamp. The main advantage of xenon lights – high light output and low power consumption. The brightness and efficiency of such light sources is several times higher than halogen lamps, and the efficiency reaches 90%. Radiation of xenon is very close to daylight, and therefore does not cause eye fatigue of the driver. The undeniable superiority of xenon over the others is their "way" through the fog, a Blizzard or a wall of rain due to the fact that the driver's eyes do not perceive reflected off snowflakes and water drops part of the spectrum of their radiation. These lamps are reliable and durable life period of xenon is not less than 3000 hours. Wide their distribution is constrained by significantly high price. Be aware that when replacing halogen lamps to xenon, without replacing the optics, reflectors and lenses of the headlights, the light distribution xenon lamps in halogen headlamp will be incorrect. A definite advantage in the quality of lighting for the owner of such a machine will appear, but it will be immeasurably small in comparison to the harm that such a light source will be the drivers of oncoming cars, irritating their blinding light. Know this: true color beam xenon light bulb – white. Bluish tint of the light source, which many mistakenly believe is the main difference of xenon from other lamps is the consequence of education in the operation of the xenon lamp on the inner surface of flasks blue scale. So the blue color of the rays from the headlights of the vehicle indicates long life xenon lamps or for use as a light source halogen lamps with bulb, painted blue "xenon", to put it simply, fakes. You lit roads! No nail, no wand!

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