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Specifications and performance parameters of automobile headlights
  2024/10/21| View:42

      Car headlights, as an important part of the car, are not only related to driving safety at night or in bad weather conditions, but also affect the overall beauty of the vehicle and the driver's visual experience. The specifications and performance parameters of headlights, such as model, power, luminous amount, lifespan, etc., are all factors that car owners need to carefully consider when selecting and replacing headlights.

1. Headlight model

      The car headlight model usually refers to the standard specification of the bulb interface, which determines the compatibility between the bulb and the headlight assembly. Headlight models are usually represented by a combination of letters and numbers, such as H1, H3, H4, H7, H9, etc. Each model corresponds to a specific headlight specification and is suitable for different types of lights, such as high beam, low beam, fog lights and turn signals.

      1)H1: Commonly used for high beam, with high brightness and range, suitable for use on open roads such as highways.

      2)H3: Mostly used for low-beam headlights. The light is relatively soft and can reduce the dazzling effect on other drivers.

      3)H4: Usually used for fog lights, it has strong penetrating power and can provide clear vision in foggy or rainy days.

      4)H7: Applicable to high and low beams, it is a more general model that can meet the needs of a variety of driving scenarios.

      5)H9: Designed specifically for turn signals, it flashes quickly to attract the attention of surrounding vehicles.

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      When purchasing new light bulbs, car owners should choose a matching headlight model based on the specific type of light needed by the vehicle to ensure the correct and effective use of the light.

2. Power and luminescence

      The power and luminous quantity of car headlights are important indicators to measure their performance. Power is usually measured in watts (W), which represents the electrical energy consumed by the bulb; while luminescence is measured in lumens (lm), which represents the luminous flux emitted by the bulb.

      1)Power: The power of low beam is usually 55 watts, and the power of high beam is 60 watts. For heavy trucks used for freight, the high beam power may be as high as 100W and the low beam power is 75W. In comparison, HID xenon lamps have a bulb power of only 35 watts, while LED headlights have between 30 and 40 watts. It should be noted that although high-power bulbs can provide brighter lighting effects, they will also increase the vehicle's energy consumption and heat generation, so car owners should weigh the pros and cons when choosing.

      2)Luminous amount: The luminous amount directly determines the lighting effect of the headlights. Generally speaking, the luminous quantity of car headlights should not be less than a certain standard. For example, the lumen value of low beam should not be less than 1050, and the lumen value of high beam should not be less than 1450. At the same time, the luminous intensity of the high beam light beam also needs to reach a certain standard to ensure driving safety at night or in severe weather conditions.

3. Lifespan and durability

      The lifespan and durability of car headlights is another important factor that car owners need to consider when choosing. Headlight life is usually expressed in hours, which reflects the average operating time of the bulb under normal usage conditions. Common life indicators include B3 and TC.

      1)B3: Indicates that 3% of the bulbs will stop working before the specified number of hours. For example, B3:330 means that 3% of light bulbs will stop working before 330 hours.

      2)TC: Indicates that 63.2% of light bulbs will stop working before the specified number of hours. For example, TC:550 means that 63.2% of light bulbs will stop working before 550 hours.

      When car owners choose headlights, they hope that these two indicators will be as long as possible to ensure the durability and reliability of the headlights. In addition, the durability of headlights is also related to factors such as their materials, manufacturing processes, and usage environment. Therefore, car owners should choose well-known brands and certified products when choosing to ensure the quality and performance of the headlights.

4. Other performance parameters

      Car headlights also have some other important performance parameters, such as color temperature, beam shape, lighting range, etc.

      1)Color temperature: Color temperature determines the color of light emitted by your headlights. Generally speaking, the higher the color temperature, the more bluish-white the light is; the lower the color temperature, the more yellow-red the light is. Car owners should choose the appropriate color temperature based on their own preferences and driving environment.

      2)Beam shape: Beam shape refers to the distribution and shape of the light emitted by the headlights. A reasonable beam shape can ensure that the light illuminates the road ahead evenly while reducing the dazzling effect on other drivers.

      3)Lighting range: Lighting range refers to the size and shape of the road area that the headlights can illuminate. Generally speaking, the wider the lighting range, the clearer the driver's vision and the higher the safety.