What are the advantages and disadvantages of halogen, xenon and LED?

Which car headlight is better?

The characteristics of the three light sources are as mentioned above. Let’s take a look at which one is better from the three perspectives of color temperature, service life and brightness.

Color temperature refers to the cost of color included in light. A simple understanding is that the higher the color temperature, the whiter the light color, and conversely, the lower the color temperature, the yellower the light color. The color temperatures of the three types of headlights are roughly:

< p> From the difference in color temperature, we can see that xenon lamps and LED headlights are more suitable as main lighting, while halogen lamps are more suitable as auxiliary lighting for fog lamps. However, due to manufacturing cost constraints, many mid- to low-end models will still use them. Halogen lamps are used as lighting lamps, and xenon lamps are mostly used in mid-range models or mid-to-high-end models of some cars. After the popularity of LED headlights, they are basically standard equipment for high-end cars/high-end models.

Therefore, the level difference of lights can also be judged from product positioning. However, once the heat dissipation problem of LED headlights is solved, the manufacturing cost will drop rapidly and eventually replace xenon lamps. There is no need for a ballast and the ultra-high-voltage LED will be inverted. It will also be the most ideal type from a safety perspective.

The advantages and disadvantages of the three types of headlights are as mentioned above. Some people predict that the shape will be laser headlights, but I personally think that LED is the most likely to be popularized. Personal opinion, for reference only.

Halogen lamps are the most common light source. It is also commonly referred to as candle light. Due to the rapid development of xenon lamps and LED lamps in recent years, the brightness of halogen lamps is far from meeting people's needs for light brightness. This has a certain relationship with the declining vision of modern people. Driving at night has increasingly higher requirements for lighting brightness.

That’s why halogen lamps are called “candle lamps”. The characteristics of halogen lamps are low cost, low color temperature (3200k), and strong penetrating ability.

Therefore, halogen lamps have unique advantages in rainy and foggy weather. But the power is slightly larger (55w) and the heat generation is also huge. At the same time, the filament has a service life, generally about 1500 hours. Because of their low cost, halogen lamps are currently mostly installed on low-end models. Also because of their strong penetrating power, halogen lamps are usually used on fog lamps.

Xenon lamps were a necessary light source for luxury or high-end models in the past few years. The brightness is significantly higher than that of halogen lamps, but the power is indeed reduced by about 1/3. A xenon lamp is filled with xenon gas and has no filament. It is a high-pressure gas discharge lamp, and the common metal halide spotlights in life have the same principle. Xenon lamps require a ballast to generate a high voltage of about 2000V, so the structure is more complex than that of halogen lamps and require a ballast to drive.

The color temperature of xenon lamps is very close to that of sunlight, and the color rendering is relatively good. The service life is also significantly longer than that of halogen lamps, which can reach 2,500 hours. The only drawback is that the penetration is poor. After the rainy and foggy days are opened, it is completely white and the penetration is almost zero. Fortunately, most models are equipped with fog lights, which can make up for the poor penetration of xenon lights. At present, xenon lamps are gradually being replaced by LEDs. Many newly launched models are no longer equipped with xenon lamps. Only modification shops are still modifying xenon lamps.

LED lights have entered the lives of ordinary people. Even lighting fixtures are gradually being replaced by LED fixtures. The main features are low power consumption, high brightness and high color temperature. It is highly controllable and without the constraints of traditional headlights, the layout can be richer. The headlight structure can be changed according to the overall style. For example, it can be designed in an array, matrix, or even font shape. In short, the shape of the car lights can be changed at will, making the shape richer and more beautiful. More and more cars are equipped with LED lights, and xenon lights are gradually replaced by LED lights.

Electrical civilization has changed the world, and headlights have also illuminated the road ahead for night driving. Car headlights have become an important component of driving safety. Currently on the market, there are various types of headlights according to different models and configurations. Common ones include halogen, xenon, LED and more high-end laser headlights, because laser headlights only appear on BMW flagship models and have not been widely used. Use, not for discussion.

Halogen headlights have been around for the longest time. Their advantages are reliability, durability, easy replacement of bulbs, and bulbs can be purchased everywhere and are cheap. Its built-in yellow light with a color temperature of about 3000k has much better penetrating power in rainy and foggy weather than car lights with a higher color temperature, and its recognition is much higher, so most fog lights are matched like this. When used as headlights, halogens are often paired with a reflective light bowl and lens. Because their lumen coefficient is limited, the lens does not have as uniform a paving effect as the light bowl. It is more for the sake of styling.

Xenon is a perfect match for lenses. On this basis, an adjustable baffle is also used to realize an integrated lens for high and low beams, which can save space and achieve higher illumination. The disadvantage is that the replacement cost of xenon bulbs is high, and the existence of high-voltage packages and many components also cause Manufacturing costs cannot be reduced, and xenon is rarely used in small cars.

Speaking of styling, the use of LED has brought the headlight styling to another level. All Honda’s wing-type headlights to the 100,000-level Lavida, Bora, Ralink, etc. are all equipped with reflectors. The advantages of bowl-type LED headlights are that they start up in seconds, have low energy consumption and negligible light attenuation. It can be said that they are "once and for all". LED is also white light, but its light intensity is still slightly inferior to xenon, but its recognition and visual effects are much higher than that of halogen lamps. Replacement is not something consumers consider. If the LED is broken, it may involve assembly and driver problems.

Halogen, xenon and LED are different types of light sources, but they do not determine the lighting effect. The design of the reflective bowl and lens is equally important, as the results in the IIHS lighting test are enough to illustrate. (Yafu)

The differences between halogen, xenon, and LED bulbs are very obvious. Taking motorcycle headlights as an example, the main differences between these three bulbs include cost, brightness, life, and power consumption.

Among these types of bulbs, halogen bulbs have the lowest cost, their service life is also the shortest, and their brightness is not very good. However, because of their low cost, this type of bulb is still the main light source for motorcycles.

Xenon headlights have very good brightness and can make the night look like daytime. However, because the cost is relatively high, they only exist in later motorcycle lighting upgrades. However, this type of headlights has a fatal problem. The disadvantage is that the power consumption is relatively high, which will virtually shorten the service life of the battery, and to a certain extent will also affect the fuel consumption of the vehicle. Secondly, its service life is not very long. This is mainly because of the xenon headlights and ballast. The probability of failure is very high, so the advantages and disadvantages of this type of headlight are very obvious.

The main features of LED headlights are high brightness, low power consumption and long service life. Compared with the first two types of car lights, these headlights can be used from the beginning of the vehicle as long as they pass the quality standard. It is scrapped, so its service life is the longest among the three types of headlights, and its power consumption is very small and will not cause any damage to the vehicle circuit at all. However, because this type of bulb is integrated with light-emitting diodes, its heat dissipation performance is relatively poor. If the heat dissipation of the bulb is not very good, it will inevitably affect the brightness of the bulb. This is also the main reason why some LED bulbs slowly dim in the later period.

From the above brief introduction, we can see that although the brightness of xenon headlights is very powerful, it is not favored by vehicle manufacturers because of its high cost and unstable performance. Halogen bulbs and LED bulbs have become the main light sources for motorcycles at this stage. Therefore, if you want to upgrade your headlights, riders should choose high-quality LED bulbs. After all, they have relatively low losses on the vehicle.

Let’s talk about price first. Among these three types of headlights, halogen headlights are currently the cheapest; xenon headlights and LED headlights are about the same price. Excluding matrix LED headlights, The price is about 10,000 yuan.

Halogen headlights are the most technically mature (that is, they have been around the longest) and are not as bright as xenon and LED headlights. However, because the color temperature of original halogen headlights is generally not high, they are not suitable for use in rainy and foggy days. The penetrating power is the best, so many low-end cars equipped with halogen headlights can simply reduce the number of front fog lights.

The relationship between xenon headlights and LED headlights can be understood as a replacement relationship. Among LEDs, its biggest disadvantage is that its penetrating power is relatively weak, especially in rainy and foggy days, so cars equipped with xenon headlights are generally equipped with a set of headlight cleaning devices.

LED headlights are the latest technology at present. The advantages of LED headlights are obvious, such as fast lighting speed, high brightness, good penetration, strong plasticity, etc.; in addition to LED headlights (quality, indicators Better) There are almost no shortcomings except that it is more expensive.

Although more and more car companies are integrating LED headlights on a large scale, it seems that there is not much market for halogen and hernia lights. In fact, if we have an in-depth understanding of the three types of lights, you will find that Each has its own pros and cons, and each is suitable for different driving conditions.

Advantages of halogen lamps: Strong penetrating power, fast turning on speed, bright when turned on, uniform light. When encountering rain, fog and other weather conditions, the penetrating power of halogen lamps is stronger than that of more advanced xenon lamps ;

Disadvantages of halogen lamps: small irradiation range, poor lighting effect, short service life, and low cost.

Advantages of xenon lamps: Due to its own characteristics, it will present blue-white light. This blue-white light will significantly increase its brightness when it shines on road signs, allowing drivers to clearly identify them; the brightness is higher than that of halogen The light is three times brighter; the irradiation range is wider than that of halogen lamps; it saves up to 50% more energy than halogen lamps and has a longer service life than halogen lamps.

Disadvantages of the hernia lamp: The penetrability of the hernia lamp is not as good as that of the halogen lamp in rainy and foggy weather. If it is not matched with the lens, the hernia lamp will diverge, which is very dazzling to the driver of the oncoming vehicle and affects driving safety; there are hidden dangers in low voltage; lighting There is a delay.

Advantages of LED lights: energy-saving, environmentally friendly, and long life. The LED lights equipped with the original car can have a lifespan of more than 30,000 hours, which means that your car cannot be driven, but the lights are still on; high brightness, Low voltage and safe, LED lights only need about 20V to light up; they light up quickly, just like halogen lights; the illumination is quite high.

Disadvantages of LED lights: High cost; poor heat dissipation. However, with the advancement of technology, the heat dissipation problem of the original LED lights of the car is not big. Special attention must be paid to those who install them later.

Finally, Maoyan Car Review reminds everyone not to modify the headlights at will. On the one hand, the vehicle takes into account the annual vehicle inspection. On the other hand, it is easy to malfunction if it is not modified properly. At present, the original headlight system of the car All can meet our daily driving needs, and no additional lighting upgrade is required.

Cars: The original halogen lamps, then the xenon lamps, and now the LED lamps equipped on many vehicles. Which of these three lamps is better? What are the advantages and disadvantages?

Halogen lamps are the same as old-fashioned light bulbs at home. The interior is filled with gases of halogen elements such as iodine or bromine. After the tungsten filament inside is energized, the tungsten filament inside emits light. Its principle is to convert electricity into heat energy to emit light, but the conversion process 90% of it will be wasted, and only 10% will be converted into light energy.

The light is yellow, has low brightness, is prone to high temperatures, and has a short lifespan. Advantages: Cheap and easy to maintain. Basically used for steering brakes.

Xenon lamps are filled with inert gases such as xenon inside the lamp. The working principle is that high-voltage xenon generates an arc and then emits light. However, because the vehicle low voltage needs to be converted into high voltage, the xenon lamp produces a brightness return. Relatively slow, it takes 8/9 to turn into full brightness

Advantages: Strong brightness and strong penetration, suitable for rainy and foggy days. However, the corresponding shortcomings are that it takes a long time to light up, and a stabilizer needs to be installed. When installing xenon headlights, a lens needs to be added. Without a lens, scattering will occur.

LED lights are light sources generated by a power-generating diode, which can directly convert electrical energy into light energy without waste. The same electrical energy is more than three times that of halogen lamps, and will not cause overheating. It can be said that Bright and energy-saving.

Nowadays it is also commonly used at home. More and more luxury cars are beginning to use LED lights as headlights, which have the advantages of fast lighting, low energy consumption, and long life.

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The advantages and disadvantages of halogen lamps, xenon lamps and LEDs. Analysis video

The questioner asked about lighting lamps. I have also come into contact with some lamps in the electrical intelligent lighting training and teaching. Today I want to communicate with you and discuss the characteristics of the above three types of lamps. .

Let’s talk about the first type of lamp, the halogen lamp. This lamp is named after the halogen gas added to the tungsten halogen bulb. The tube wall temperature of this kind of lamp is very high, higher than that of ordinary incandescent lamps, so its bulb is smaller. Due to the small size of the bulb, the halogen bulb has high intensity, and its outer shell is made of quartz glass.

In use, it can be divided into two types according to its working voltage: mains type and low-voltage type. The addition of halogen gas in the bulb can effectively inhibit the evaporation of tungsten, thus greatly improving its light efficiency and operation. temperature, after experiments, the light efficiency can reach 12Lm/W; in terms of color rendering, halogen lamps used for general lighting are whiter and have better color rendering than incandescent lamps. After extensive use, it has been proven that its working life can reach 2,000 hours, and its service life can be slightly extended after dimming.

Xenon lamp (HID), which is a gas discharge lamp, generally consists of three parts, namely a bulb, a high-voltage package, and a ballast. This kind of lamp is a white super strong arc light produced by gas discharge, which can increase the color temperature of the light, like sunlight during the day. This kind of lamp has high brightness, and its brightness is generally three times higher than that of halogen lamps, and its working life is ten times that of halogen lamps. Gas discharge lamps like this generally cannot be tripped.

The light source of LED lights is the cold light source emitted by light-emitting diodes (LEDs). This kind of lights can be controlled by various types of dimming and does not require much power to light up. Its energy-saving effect It is extremely remarkable and widely used in ordinary families. Its lighting is different from the first two lamps. It relies on the circuit to provide a constant current to maintain the brightness of the lamp. This kind of lamp has the characteristics of high efficiency, high brightness and long life.

The above are my answers to the characteristics of the above three lamps. Everyone is welcome to discuss and pay attention! If you have any questions, please pay attention to electronics and industrial control technology, let’s discuss and make progress together!

When buying a car, you often find that the headlights of vehicles with different configurations are also very different, and can even directly affect the price of the vehicle.

When looking at cars, we often hear the terms halogen headlights, xenon headlights, and LED headlights. What is the difference between these three? What are the advantages and disadvantages of each?

Classification of car headlights:

1. Halogen headlights:

Halogen headlights can be said to be the oldest type of light used in cars. They are actually incandescent. It evolved from the lamp. We have learned in high school physics class that incandescent lamps are illuminated by tungsten filaments after being powered on, so the structure is very simple. However, when working for a long time, the temperature will rise rapidly, and the tungsten filaments will condense after evaporating. On the lamp housing, this will greatly affect the life of the lamp. Halogen headlights are based on incandescent lamps and add inert halogen gases into the bulb. Because of the high stability of the inert gas, the brightness and life of halogen headlights are much higher than those of incandescent lamps.

Compared with other light sources now, although the brightness is not very high, especially on urban roads with good lighting conditions, the relative brightness of those with lenses is a bit higher, and the halogen headlights without lenses are basically the same as not turning on the lights. The brightness is very poor. However, because halogen lamps can emit orange-yellow light color, have low color temperature and very strong penetrating power, and the penetrating power is very good in rain, snow or foggy days, so the fog lamps on many luxury models still use halogen light sources.

Advantages: simple structure, low cost, sensitive response, strong penetrating power

Disadvantages: high temperature, low brightness, longer use time, the brightness will become darker and darker, see It doesn’t look classy enough

Representative models: Volkswagen Jetta, Geely Emgrand

2. Xenon headlights:

There is another name: high-pressure gas discharge Headlights, xenon headlights do not have filaments inside, but are filled with rare gases. First, the 12V voltage of the car battery is increased to an ultra-high voltage of 23,000V through transformation, and then the ultra-high voltage is connected to the rare gas. gas, thereby lighting up the xenon gas inside, and then converting the ultra-high voltage to 85V so that the xenon headlights can continue to light up. Therefore, the brightness of xenon headlights is more than three times that of ordinary halogen lamps. They have a long service life and are also energy-saving. But I just saw that xenon headlights need to be started, so it takes a while to actually light up and exert their illuminating effect. Many models are now gradually no longer used.

Advantages: high-grade, high brightness, large size

Disadvantages: high cost, delay in lighting, poor penetration

Representative model: No. 1 Daimaotan

3. LED headlights:

Meaning light-emitting diode, which uses solid semiconductor chips as luminescent materials to recombine carriers, thereby causing photon emission and emitting light. . It is a light source that has developed rapidly in recent years. It combines all the advantages of halogen lamps and xenon lamps. It can directly convert electrical energy into light energy, with high conversion efficiency and energy saving. It is twice as bright as xenon headlights, lights up quickly and has a long lifespan (the lifespan of LEDs is about 100,000 hours, while xenon lamps only have 3,000 hours). However, product quality also varies, and the LED lights of high-end models are more effective.

Advantages: small size, long life, high brightness, high plasticity of lamp units, diversified shapes and designs

Disadvantages: high cost, poor heat dissipation

Representative models: FAW-Volkswagen Magotan, Audi A6