LED, the next car lighting trend
At the 2003 North American International Auto Show, Volkswagen launched the Audi PikesPeakquattro concept car, which designed the front fog lamp as a narrow-band type and equipped it with LED lights for the first time. This is the earliest prototype of daytime running lights. In recent years, whether the joint venture is a self-owned brand, low-end or luxury brand, daytime running lights have become the standard of many cars. From the perspective of EU countries that began to explore and respond to daytime running lights regulations, the use of daytime running lights has indeed played a positive and effective role in improving road safety and reducing traffic accidents. For China, a large automobile production and sales country, driving safety has become a top priority. Daytime running lights are no longer a face-to-face high-end configuration, but truly become a must-have for safety.
The LED headlights are more exciting and smarter in the front. For example, Mercedes-Benz 2015 CLS is equipped with multi-beam LED headlights. This technology uses multiple LED lighting units to enable high-end illumination of the high beam, thus avoiding interference to the driver. In other words, even if you drive the high beam and the other party, you don't have to worry about the safety problems. The fastest LED lamp application is Audi, which is basically replaced by the whole system. Audi is famous for its matrix LED headlights. Lexus NX not only headlights are LEDs, but fog lights also use LED technology. Although LED headlamps are mainly used in high-end models, it feels out of reach, but recently many automakers have begun to try to turn LED headlights into mid- to high-end models, such as the modern IX35.
Although economically capable owners are willing to use LED lighting to improve driving safety. However, the LED market is not flat, the prices are varied, the quality is uneven, and the good price is good, everyone wants it, but it is difficult to have such a thing on the market.
Comparison of the advantages and disadvantages of three mainstream lights
The halogen lamp is like a jug of old wine. From the birth of the halogen lamp for the lamp in 1960 to more than half a century now, it is still alive and well. It can be used in the car for a long time. It is such a lamp that is widely used in automobiles, so that its manufacturing cost is extremely low. The disadvantage is that the light output efficiency is low and the irradiation distance is short.
HID lamps began to be used in automobiles in the early 1990s. German car manufacturers have promoted this technology. Its superiority is that the light output efficiency is higher than that of halogen lamps, the lumens are three times that of halogen lamps, and the lifespan reaches 3000 hours. Outputs easily recognizable white, blue, and purple light. The disadvantage is that the first start takes 5-7 seconds to reach the full light output.
Like HID, LED lights have no filaments, require little power, and are resistant to vibration. LED light is close to natural light, and the efficiency of light output is unmatched by other two kinds of light sources. The light performance of a 1000 watt halogen lamp is almost the same as that of a 200 watt LED lamp, and the service life is up to 30,000 hours, which is 10 times that of HID. The downside is that the market is not mature.
About car light color temperature
The color temperature is expressed by the absolute temperature K, and when the color temperature is about 3000 K, the color of the light is yellowish. When the color temperature is above 5000K, the light color is bluish. Choose different color temperature headlights according to different environments. For example, if you want to cope with rain and fog weather, you can choose yellow light with strong penetrating power. If you like personality, you can also use high color temperature blue light. Also know that color temperature is a measure of color temperature and is not a measure of the brightness of a lamp. The color temperature of halogen lamps can be from 2300K to 7000K; the color temperature of HID and LED lamps is from 4200K to over 8000K; the higher the color temperature of the lamp, the worse the penetration of fog and rain.
LED lighting ten questions 1. What lights are on in the daytime, stinking!
The daytime running light is not a light, nor is it to enable the driver to see the road, but to let others know that your car is coming over. It belongs to the category of signal lights, which is a little active and safe. In Northern and North American countries, such as Sweden and Canada, because the winter is long and often snows, the transportation department stipulates that driving during the day must be turned on. But maybe you will say that China is not Nordic, is it necessary for some regions to be as big as the sun all day? It is still necessary because the human eye is sensitive to bright things. When you will drive, if you let others in the first place Discovering you can greatly reduce the chance of a traffic accident.
2. The light is always on. Isn't this a waste of energy?
For the two-in-one product of the LED daytime running light and fog lamp installed in the new Focus, it has six LEDs on each side, one watt each, and the two sides add up to only 12 watts, counting three LED fog lamps on the left and right sides. In total, it is also 30 watts. Even LED headlights are more energy efficient than halogen lamps. Halogen headlights have 55-watt, 75-watt, and 100-watt specifications, while LED headlamps are controlled in 40-80 watts. In addition, the HID starts the instantaneous current to produce a higher wattage, and the single lamp will rush to more than 90 watts. It can be seen that it is unreasonable to suspect LED electricity.
3, Big Brother, your lights are not off!
This raises the question of how to use LED daytime running lights. Taking the above LED products as an example, when the car engine is started, the daytime running lights are automatically turned on. If the lights are not turned on, the daytime running lights should be fully powered for the safety warning function; When the light is on, the daytime running light will be half bright. This is because the width light has already had a warning function; when the headlights are turned on, the daytime running light is off, because the headlights are brighter, and it is no longer necessary to turn on the daytime running lights. This is consistent with the order of use of Mercedes-Benz and Bao’s daytime running lights, but many inferior daytime running lights will shine in the end, not even half-bright.
4, my eyes are spent, really annoying!
In fact, if you are driving on the road, good LED daytime running products will rarely make other drivers feel uncomfortable, because the daytime running lights also have a certain angle, thanks to the role of its reflector. It can only feel a bit dazzling when approaching the front of the vehicle, and it will not affect the vehicles and pedestrians on both sides of the road. Daytime running lights should meet the basic brightness requirements, but they should not be too bright, so as not to interfere with others. Some merchants only pursue brightness and neglect the angle, thus causing light pollution.
5. How is the fog light of that person white?
The span of China's north and south dimensions is large, and the complexity of the climate environment is determined by whether it is yellow or white. Studies have shown that the human eye is 20 times more sensitive to yellow light than red or blue light, which is one of the important reasons why fog lights and road lights in most cars use yellow light. The North American model is mandatory for yellow light, especially for snow sweepers in the northern United States, because it is basically useless. However, domestic new cars are not regulated to use yellow or white light. Generally, yellow light is used. It is not impossible to modify white light. It can be decided according to personal preference and climate conditions in the region.
6. Who is better for LEDs and HIDs for headlights?
The light from the LED headlights is close to daylight, so people's vision will be very comfortable. Studies have shown that the color temperature of 5500K is more favorable for the eyes. The color temperature of the 6500K LED lamp is closer to daylight than the 4200K xenon lamp. Therefore, there is a scientific basis for using the LED as the headlight of the car, not to mention the LED headlamps have a lot of other advantages. The power saving is half of the HID lamp, the brightness is twice that of the HID lamp, the life is 10 times that of the HID lamp, and the heat dissipation is also small.
7. Does the LED headlight match the halogen lamp and the lens light type?
The LED headlights are close to halogen lamps, and some are better than halogen lamps. If the original car has a lens, the effect of adding the LED headlight is better, because the lens will add a cutting line, which is more in line with the driving safety standard. Although the reflector has no clear lens, it also has a sideline. From the effect of Fox installation, the light pattern in the distance is wider than the original car, but the local light and shadow in the vicinity will make people feel a little uncomfortable, but fortunately, the LED headlights are bright enough, this is not a big deal. After all, what light produces light and shadow.
8. What is the difference between LED headlights and halogen lamps and HID far and near light switching methods?
The LED headlight combines the mode of the halogen lamp and the HID telescopic lamp. The position of the lamp bead is different from the left and right. The near-light is bright on the top, the high beam is all bright, and the low beam is equivalent to the fill light when the far light is turned on. This fill mode switches between far and near light and halogen lamps, and HID is different. Because Mercedes-Benz BMW designed the far and near light into one, by moving the moving light film to another angle, the brightness did not change, and the angle of the light was changed. In addition, due to the way of filling light, there is no delay in switching between far and near light.
9. How is the installation difficulty of LED headlights compared with HID?
At present, some LED headlights on the market use an integrated built-in driver, which looks slightly larger than the halogen lamp of the original car, but can completely replace the original car halogen lamp. This one-piece design differs from the HID split structure in that it solves the need for punching during installation. It can be said that as long as you will disassemble the halogen lamp, it is not a problem to install this product DIY yourself. However, the dust cover of a very small model will be relatively short. Fortunately, there is a universal back cover on the market, and it can be solved in just over a dozen dollars.
10. Is the LED headlight sold online reliable?
Now there are many sellers of online LED headlights, and the quality of the products is uneven. If you see the manufacturers to avoid cost and low price competition, you should be careful. Good LED materials are very different in price. Taking CREE as an example, the temperature of the lamp beads reaches 150 degrees Celsius, and almost zero light decay in half a year. The domestic LED products have a light decay of 80%% in the second half of 80 degrees Celsius. Because the heat is not enough, all the materials will age, and of course the problem of light decay will occur.
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