How to adjust the H4 LED Headlight Bulbs to focus

The problem of condensing or not concentrating the headlights of cars using H4 LED Headlight Bulbs is to be analyzed in two aspects. Which two aspects will be analyzed below:
1. Reflective bowl, because many cars using H4 LED Headlight Bulbs are designed with reflective bowls. H4 LED Headlight Bulbs have two light emitting points, one is low light and the other is high light. If the focus of the reflective bowl design is not Very accurate, then, the lamp bowl of this car will also have astigmatism. It doesn't make sense to replace the LED light, because it will still be astigmatized. If the original car does not have astigmatism, it can be replaced!
2. The design of H4 LED Headlight Bulbs. There are many low-quality and low-quality LED lights on the market. The purpose of making them is as long as they can emit light. The specific focus issue need not be considered at all. The lights are mounted on the car, the car is dazzling outside, and the road is not clear; therefore, if the focus of the car lights is not correct, it cannot be adjusted. It can only be replaced with high-quality led headlights, such as Ye'anxing Series of led car lights; because only the focus of the car lights are correct, the emitted light can be effectively focused on the road!
In summary, the H4 LED Headlight Bulbs bead emit light from left to right, and the light board is vertically downward. If this is adjusted, and the light is still not focused, then you only have to change the bulb, and this headlight will not be used.