LED car light / halogen lamp / xenon lamp Which actual lighting is the safest?

The recent investigations and test reports issued by the Southern California Automotive Research Center Vehicles Club (AAA) have led to extensive discussions in the US media and automotive circles. This test report shows that in rural roads without street lights, the range of headlights is not safe. standard. Even if your model has the latest LED lights, it may not be safe after driving at speeds above 55 mph (about 88 km/h). The report also compares the actual safe exposure distances of existing halogen, xenon and LED lights on the market, and the results are not satisfactory.

Driving under the black light at night: headlights generally fail to meet safety standards

It is understood that in order to evaluate the lighting effects and limitations of the vehicle headlights in the current market, and to understand the application effect of the new headlight technology, AAA compared the actual illumination distance of ordinary halogen lamps, HID lamps and LED lamps. The test results show that whether it is low beam or high beam test, compared with the current National Highway and Transportation Association's lamp safety guide, the existing vehicles are driving at night without road lights, all types of headlights. The illumination distance did not reach a safe distance for the owner to find the target and then react in time and stop the brakes.

A person in charge of the Vehicle Club of the Southern California Automotive Research Center said, "The AAA test results show that the headlights on the current US models do not meet safety standards. Because the roads are not well illuminated at medium speeds, the owners It is often impossible to see the pedestrians or animals on the night road. It is too late to see the brakes."

Halogen: Can it be unsafe to exceed 60 kilometers per hour?

Specifically, the AAA night road test results show that the halogen lamp low beam mode may not safely illuminate the road without street lights after driving at 40 mph (about 60 km / h). Night driving poses a safety hazard, and most models on the road today are equipped with halogen lamps.

Although the high beam mode of the halogen lamp can increase the visible distance of the owner by 28% during the test, in the realistic driving environment, the high beam cannot be used after the speed reaches 48 mph (about 77 km/h). Provide sufficient safe illumination distance to allow the owner to park safely. Moreover, the AAA survey also found that only one-third of American car owners said that they would use the far and low beam lights alternately during the night driving process, especially when driving on street without street lights.

Xenon lights and LED lights: The speed of the night road can not exceed 72 kilometers?

The test found that compared with halogen lamps, the more advanced headlight technology on the market, such as HID and LED headlights, when the streetlights are not driving at night, the low beam illumination range is 25% farther, but still reaches the speed. After 45 mph (about 72 km/h), the road cannot be completely safely illuminated. When the high beam mode is turned on, these headlights will be illuminated up to 500 feet in the low beam mode. However, despite the substantial improvement, and the most advanced headlight technology, it is still 60% smaller than the full-day downlight.

How to create a safer night driving?

“Although the visual distance of the latest technology is significantly improved, people feel the security guarantee, but there is still room for improvement,” said a person in charge of AAA. “Unlike the headlight technology that is more advanced in the European market, the US government regulations still limit the light output intensity of the headlights sold. AAA is currently working with US policymakers to ensure that federal regulations keep up. New technologies that are constantly improving."

From the domestic market point of view, government regulations also have very strict specifications on the illumination intensity and angle of vehicle headlights. The technical ability of automobile manufacturers in terms of headlights is unquestionable, but how to achieve it is enough to make the vehicle owner's nighttime visible distance long enough. The line of sight is wide enough, and it does not affect the safe driving of other vehicles because the intensity of the light is too large. This seems to be a big problem.

Fortunately, in recent years, we have seen a number of new technologies from manufacturers, such as the automatic anti-glare technology of rearview mirrors introduced by Audi and other manufacturers. This rearview mirror monitors the rear light intensity through sensors and automatically adjusts the specular reflection effect. The light that makes the glare of the vehicle behind the night dim and soft. Volvo also introduced FAHB full-intelligent active high-beam technology, which uses a detection device to scan and monitor vehicles in front and opposite. When the vehicle in front is detected, the projection module in the system will start, using the block in the headlights. The board automatically blocks the light in the corresponding area without disturbing the line of sight of the preceding vehicle; and as the vehicle moves, the distance between the vehicle and the preceding vehicle is scanned in time until the end of the vehicle or overtaking.

Of course, in addition to the efforts of the car companies and the improvement of relevant standards, the owner of the car should also pay attention to the maintenance of the lights during the use of the car. AAA test found that the headlight lens assembly pollution will also affect the intensity and brightness of the light. The protective cover on the lens will gradually become aging and dirty after five years of use, reducing the light output, and also because Light scattering causes glare to the owner of the opposite vehicle, so the old models need to be inspected every year to improve the aesthetics and also have better safety.

In addition, it is also necessary to remind domestic car owners that although on ordinary nights, the high beam function of turning on the xenon lamp and the lens is better than the halogen lamp, but the premise is that the air quality and visibility are not too bad. Due to the high color temperature of the xenon lamp, in the case of foggy weather with poor visibility, the fine particles suspended in the air will be diffusely reflected, and a white color will appear in front of the eyes. In this case, ordinary halogen lamps are in such a harsh environment. Penetration is more advantageous.