How to choose the right LED lamp?

With the improvement of people's living standards, the proportion of cars per capita in China is also rising year by year, and people's requirements for cars are also higher and higher. With a high-quality car, the configuration of the car naturally needs to be improved. Compared with the traditional halogen lamp and xenon lamp, LED lamp gradually appears in the public view and is loved by the public with its advantages.

LED lamp

1、 Why LED lights?

In short, LED lamps are brighter than halogen lamps, more energy-saving, environmental protection and longevity than xenon lamps.

Although halogen lamps are cheap, they have low light output efficiency, short irradiation distance and yellow light. Although the light output rate of Xenon car is similar to that of LED, it takes several seconds to wait for xenon lamp to reach all light output when starting, and the service life of xenon lamp is shorter than that of LED lamp.

At present, LED lamp technology has matured, and there are led replacement lamps specially for entry-level car owners on the market. It is almost the same size and usage as halogen lamps, which can realize lossless installation.

2、 How to choose LED lights?

The three parameters of LED are brightness (lumen), color temperature and light type.

1. About lumens

The lumen value is closely related to the brightness. Usually, the larger the lumen value, the brighter the lamp. Many bad businesses will advocate high lumen value. They have asked to prove that the product is very bright, but in fact, they do not test and calculate the lumen value in the correct way. Generally, large regular manufacturers will use the integrating sphere to comprehensively calculate the convective value. Integrating sphere is a hollow sphere with white diffuse reflective material coated on the inner wall, also known as photometric sphere, luminous flux sphere, etc. it is a professional efficiency device used to collect the scattering or emission of light from the sample in the sphere or outside the sphere and close to a window.

2. About color temperature

The color temperature is not the bigger the value, the better. Color temperature is a unit of measurement that indicates the color component contained in light. 3500K halogen headlights have low color temperature and yellow light. For driving at night, not only the lighting brightness is not enough, but also increases the driver's sense of fatigue, which is not conducive to driving at night. LED headlights, positive white light, can reach the irradiation range of driving at night, and people look much more comfortable. 7000K xenon headlamp, the bright white light obviously has blue light, the irradiation range is improved, but the penetration is very poor.

3. About light type

The light type of automobile headlamp refers to the angle and shape of automobile headlamp light. A good light profile has two important positive effects on the lamp:

First, a clear light type cut-off line, which is a necessary guarantee for driving, not a high beam dog. If there is no clear cut-off line, the light type is not only scattered and does not focus, but more seriously, it makes the driver of the opposite car feel dazzling and shake his eyes when meeting, which affects driving.

Second, a good light type is more beneficial to the distance of paving, can illuminate a wider front road, the driver will have a wider left and right vision, and can timely find people or animals suddenly appearing from both sides of the vehicle at night. On the basis of meeting the clear cut-off line, make the distance between 50m and 75m in front of the vehicle bright and clear as far as possible, which can help the driver find obstacles earlier. The longer and wider the beam closer to the front of the vehicle, and the wider the irradiation range, the better.