With the continuous development of automotive technology, the technical standards of automotive road lighting installations are also constantly updated. On September 29, 2024, the new version of the national standard GB 4599-2024 for automotive headlamps was released and officially implemented on July 1, 2025. This article provides a brief comparison and summary of the national standard GB 4599-2024 with the European standard regulation UN R149.01. I hope it will be helpful to you in the national standard and ECE certification.

1. Light distribution performance: light intensity in the direction of the reference axis (unit: candela).

(1) Low beam (basic low beam) GB 4599-2024

(2) High beams

From the above data, it can be seen that the requirements for GB 4599-2024 and UN R149.01 versions of basic high and low beams are exactly the same. Moreover, according to the requirements of the applicant or manufacturer, the minimum value of the above light distribution performance applies to half of the sum of the measured values on both sides of the device or system, and the low beam for 50L and 50V test points, the light intensity provided on each side of the device or system should be greater than 50% of the minimum value. For high beam HV points, the light intensity provided by each side of the device or system should not be less than 16000cd. In addition to the basic high and low beams, UN R149.01 also includes Class V low beam, Class A high beam, as well as Class C, Class E, Class V, Class W, and adaptive high beam for adaptive headlamps. The category of GB 4599-2024 is relatively simplified, and there are not so many categories of ECE.

(3) Front fog lights

Test points and test areas for front fog light distribution performance

GB 4599-2024/ UN R149.01

For paired front fog lights, according to the requirements of the applicant or manufacturer, half of the sum of the measured values on both sides of the device or system should meet the requirements for light distribution performance in the table (except for line segment 6 and line segment 7).

(4) Corner light