It's impossible for me to spend 200 yuan on an upward LED light online.

Can't I spend 200 yuan online to buy an LED light for uplink?

How about buying two brighter LED bulbs online and changing them yourself? Will there be any hidden dangers?

Let's talk about feasibility first, and we can definitely change it.

The famous ones are Philips, Osram and Foshan Lighting. There are products that match special models. I just glanced at a treasure, the high beam of Toyota Corolla, the cheapest one of Philips is more than 200 yuan, and the one of OSRAM is more expensive, 360 yuan.

It is easy to change. Now most LED bulbs are plug-in, which means "the original car is in place". Unscrew the old one and screw in the new one. Or pull out the old one and plug in the new one. All right.

Basically, it is almost as difficult as changing chargers for plug-in and patch panels at home. A simpler car, with more space behind the headlights, can be done by itself.

Several models, the engine compartment layout is relatively compact, so it may be necessary to remove a bumper and spend 10 yuan and 20 yuan's working hours. Go to the store to change them and ask them to do me a favor.

Will there be heat dissipation problems and security risks?

It's really no trouble to change it. The price is ok now, but some friends are worried that it's as simple as that. Will it be a problem to insert it like this? Didn't I often say that LED is good before? Is there a short board for heat dissipation? Once overheated, the life of LED lamps will be shortened and the brightness will be reduced? In fact, the manufacturer must know this when designing, right?

At present, LED bulbs of big brands generally use copper substrates with LEDs embedded on them, and the base is equipped with special fans for heat dissipation. It is said that people buy a light bulb, and its radiator is available.

Qin Diancheng, Chen and others published the corresponding paper "Development of LED automobile light source based on thermoelectric separation concept" in China Journal of Lighting Engineering. This kind of direct-inserted LED lamp has been tested: the ambient temperature is 65℃, and after the LED light source works for 6000h, the luminous flux is almost not attenuated.

After 100 times of cold and hot cycling from minus 40℃ to above 85℃, it can still work normally, which can fully meet daily use, and friends in the north don't have to worry, even in Mohe. Moreover, the plug-in LED lamp does not need to be broken. Just plug in the original plug. As long as the power is not too outrageous, there is generally no circuit hidden danger. If you are not sure, ask the master.

What is the effect after replacement?

Although there will be no heat dissipation problem, the actual effect after replacement is very different, mainly depending on the matching degree of the original lens and LED. The luminous principle of LED lamps is different from that of halogen lamps, and the positions of luminous points cannot be exactly the same. If installed, it may affect its spotlight effect.

Fan Min and Tang Shuming published a paper "Light Efficiency Analysis of Reflective LED Car Lights" in China Lighting Appliance magazine.

It says: Reflective LED lamps, the focal length of the reflecting surface, the ratio of width to height, the discharge position of the lamp bead, the rotation angle and other parameters will affect the light efficiency of the whole optical system. Actually, it is very similar to the clothes we bought. Everyone is different in height and weight. Buy a few yards. That's right. Are they all called XL?

Some people will look fat in it, while others will look thin. Therefore, you should also be mentally prepared when buying. The effect may be good or not as expected. How to judge whether the bought LED is easy to use after installation?

An easier way: find a white wall and turn on the light at night. If there is an obvious tangent, the light shape is also two light clusters, and the effect is ok, which can be used as a reference.

Some friends bought cars earlier. There is no lens in the original factory, but it is a reflective bowl. If you simply replace the LED bulb, the effect may be worse. It looks really white, and I can hardly open my eyes, but the light is actually scattered. If the driver on the other side can't open his eyes, he may accidentally hit us in one direction.

Dear friends, use the high beam carefully at night. In this case, it is not recommended to replace the LED bulb. It is better to change a halogen bulb with a higher color temperature, which looks whiter and the brightness can be increased by 80% to 130%. For example, Philips, Osram, 100 yuan, 200 yuan has also landed.

What should I pay attention to when choosing a light bulb?

If the original car has a lens, I want to buy an LED light bulb to try. When choosing a light bulb, pay attention to two points.

Parameters must be optimistic.

First of all, we should carefully look at the various parameters of LED bulbs, and pay attention to products that exaggerate publicity and falsely mark brightness.

For example, a treasure's 70-80W LED headlights promote brightness of 32800lm；; Another headlight, about 100W, has a publicity brightness of 35000lm. In fact, this brightness is basically impossible to achieve.

Jiangsu University's Wang Qiwen Master's thesis "Secondary Optical Design of LED Street Lights and Car Lamps" mentioned that the luminous efficiency of LED lamps is generally around 80 to150lm/w/w. You simply calculate that the brightness of an 80W bulb is 12000lm, which is far from the advertised 32800lm.

Therefore, when buying a light bulb, you must first confirm whether its data indicators are true. I just thought there was an algorithm. Just multiply it. Generally speaking, big brands are relatively reliable, accurate and better.

The color temperature must be chosen properly.

Second, pay attention to the color temperature, don't choose too high, try to choose a more suitable one. At present, the LED bulbs on the market are generally promoting white light, ultra-white light and ultra-white light, and the color temperature is generally 5000 K and 6000K, all of which go up like this.

But the higher the color temperature, actually, I tell you, it looks cool, bright and white. In fact, the higher the penetration, the worse. Shao Maofeng, master thesis of Ji Liang University, China, photometric characteristics and evaluation of road lighting in foggy days.

There is a contrast: under the same smog level, the illumination of 3000K LED lamp is greater than 5000K color temperature.

If there is an independent halogen fog lamp in front of the car, the problem is not big. If there is no fog light alone, there will be relatively more fog in the area. When the light is dimmed, the color temperature will be reduced appropriately, which is almost 4000 to 5000 K.

It's okay to lower it. Don't set the price of 5500,6000,6500. It's not necessary. It's really not difficult to buy an LED bulb and change it yourself. So generally speaking, it is not difficult to buy an LED light bulb and change it yourself. A few hundred dollars can usually be done. If it is well matched with the original car, the lighting effect will indeed be improved, and great things can be done with a little money.