Standards for LED light sources in vehicles

LED lighting is an essential component of modern vehicles. This lighting offers benefits in terms of durability, efficiency, and brightness. In Europe, the approval of LED light sources is regulated by the ECE R128 standard, ensuring uniformity across all participating countries.

What is the ECE R128 regulation?

De ECE R128-norm specificeert de technische vereisten voor de goedkeuring van LED-lichtbronnen in voertuigen. Dit betreft met name het ontwerp, de elektrische en fotometrische eigenschappen van de lichtbronnen. Fabrikanten die LED-verlichting op de Europese markt willen aanbieden, moeten aan deze richtlijnen voldoen om te zorgen voor veilige en betrouwbare producten.

Key technical requirements

The ECE R128 regulation contains specific requirements regarding various technical aspects of LED light sources. This ensures that vehicles equipped with LED lighting can safely be driven on the road.

Light intensity

Each LED light source must comply with standardized intensity distributions according to the ECE R128 to ensure sufficient visibility. Additionally, this is measured after a 48-hour aging process, where the light intensity is normalized relative to the luminous flux. In this way, it is ensured that the lighting performs optimally under normal conditions.

Color of the light

The color of the light must fall within the specified tolerances. This is especially true for white LEDs, where a minimum amount of red light is required to ensure visibility and recognition. Therefore, these specifications are crucial for the safety of the driver and other road users.

Finally, the minimum red content is calculated using the following formula:

610nm780nm Ee(λ)V(λ) dλ / ∫380nm780nm Ee(λ)V(λ) dλ ≥ 0.05

where:

  • Ee(λ) the spectral distribution of irradiance,
  • V(λ) the spectral luminous efficiency function,
  • λ the wavelength (in nanometers).

This value must be at least 0.05 to comply with the standard (R128e). This means that the light must have a minimum red component. Therefore, it is important for the visibility of the LED light source in traffic situations.

Electrical requirements

LED light sources must meet standardized electrical requirements, including voltage and current limits. The power is tested at specific test voltages to ensure that the lighting operates correctly within a defined range.

Related topics: Learn more about ECE R87 daytime running lights and ECE R10 standards for additional information on vehicle lighting.

Why is compliance with the ECE R128 standard important?

Compliance with the ECE R128 standard is crucial for manufacturers who want to bring their LED light sources to the European market. The standard ensures that products meet legal requirements and contribute to road safety. For consumers, this means that their vehicles are equipped with durable and reliable lighting.

Benefits of the standard

  • Legal compliance: Manufacturers that comply with this standard can sell their products in Europe without issues.
  • Wettelijke naleving: Fabrikanten die voldoen aan deze norm kunnen hun producten zonder problemen in Europa verkopen.
  • Consumer confidence: In short, this allows drivers to rely on high-quality lighting that meets strict safety standards.

External source: For more details about ECE R128 and other lighting standards, visit the official UNECE website.