To talk about which LED headlight is more suitable for your car, the first question still depends on what brand and model your car is? Different cars have different applicable LED headlights.

One .Does your car need to be decoded？

If it is a car such as Volkswagen Sagitar, Jeep, BMW X1, ordinary LED headlights are not acceptable, and special LED headlights with decoding function must be installed. If you install an LED headlight casually, there will be a fault light alarm on the car dashboard, which will affect the radio, or cause the car lights to turn off, flicker, etc., do not be careless.Therefore, for cars such as Sagitar, Jeep, and BMW X1, ordinary LEDs with decoding function are not acceptable, and special decoders need to be installed.

Two .car lens matching method

If there is a lens, is it a low-beam lens or a bifocal lens? For the headlight assembly with lens, the lens will block part of the light. Therefore, choose LED headlights with higher brightness.
1), low beam with lens: refers to the car headlight low beam with lens, but the high beam without lens, shown as below:  

As you can see from the picture above, this car has a lens for the low beam and no lens for the high beam. This is the most common combination. The reason why the low beam is matched with the lens is because:automobile headlight type standard:

The low beam requires a tangent to the light type, low on the left and high on the right, which does not affect the sight of the driver on the opposite side;

High beam requires condensing light and long distance.

2). Both low and high beams do not have lenses: no matter whether it is low beam or high beam, there is no lens. This is also a very common way of matching. In particular, many Volkswagen series models do not have lenses for both low and high beams. 

As can be seen from the picture above, the low beam and high beam of this car do not have lenses. However, the low beam and high beam reflector bowls are different. The low beam reflector bowl is large and round, and the high beam reflector bowl is small and pointed; the reflector bowl is different, which determines the light type.

3）.Double-lens lens: refers to the high and low light sharing a bulb, and the high and low light effect is achieved by switching the light barrier in the lens, shown as below:

As can be seen from the picture above, the low beam and the high beam share a light bulb. This bulb is always on. The effect of high and low light can be achieved by moving the light barrier up and down

The light type from the bifocal lens, the low-beam light type naturally has a tangent, the left side is low, and the right side is high, which does not affect the vision of the driver on the opposite side.

If the original car does not have a lens, it is necessary to choose the kind of LED headlights with "low beam with tangent function".

What is "tangent"? The so-called "tangent" refers to the low-beam light shape that is low on the left and high on the right, and does not affect the driver's line of sight when meeting cars.
Third, upgrade the LED headlight solution

1. Low beam with lens, high beam without lens: On a car with low beam with lens and high beam without lens, if the low beam is installed, the light type will have a tangent; the high beam does not need to install additional lenses, but it does Install LED bulbs with good concentrating ability.

The high beam does not need to be tangent, and the high beam requires a light-type condensing light, and the irradiation distance is long. Therefore, most car high beams have no lens. So what kind of bulb is used for high beam focusing effect? Requirements are as follows:

.The light source spacing is small enough

.The light source is small enough

.LED headlights come with condenser

2.Double-lens lens: upgrade and install LED headlights for cars with double-lens in the original car. The original car is equipped with a double-lens lens as standard, so there is no need to install the lens.

3. Both high and low beams do not have lenses: upgrade and install LED headlights for cars that do not have lenses for far and near beams. Do you want to install lenses? If the lens is not installed, will the light be too scattered?

Too many drivers have asked this question. First of all, let’s take a look at the Volkswagen series, such as Lavida, Langxing, Sagitar, Lingdu, etc., all of which are high and low without lenses, but the low beam from the halogen bulb of the original car is tangent, and the high beam is also very concentrated. Light, how did Volkswagen achieve tangent without lens?

When designing the car, the original designer meticulously designed the reflective bowl for the high and low light, making the reflective bowl large and round, and through the careful arrangement of the reflective lenses, there is no lens but also a tangent.

However, there is a slight difference between the car LED bulbs and the original car halogen bulbs. Therefore, to upgrade and install LED headlights for cars that do not have lenses in the far and near lights, you need to pay attention to the following points:

a. The luminous focus of LED headlights is similar to the original halogen bulb

b. The spacing of LED headlights is small enough

c. It is better for LED headlights with low beam with trimming function