ChinaAutoRegs｜GB 25991-2010 英文版翻译 汽车用LED前照灯
Automotive Headlamps with LED Light Sources and/or LED Modules

1 SCOPE

This Standard specifies the test methods and inspection rules for the photometric characteristics, light colors and temperature cycling of vehicle headlamps equipped with LED light source(s)/module(s) or headlamps including LED light source(s)/modules.
This Standard applies to LED headlamps of categories M and N motor vehicles, or LED headlamps emitting passing beams or driving beams mainly by LED light source(s) or LED module(s).

2 NORMATIVE REFERENCES

The following Standards contain provisions which, through reference in this text, constitute provisions of this Standard. For dated references, subsequent amendments (corrigenda excluded) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the Standards indicated below. For undated references, the latest edition of the applicable Standards referred to apply.

GB 4599-2007 Photometric characteristics of headlamps for motor vehicles
GB 4785 Prescription for installation of the external lighting and light-signaling devices for motor vehicles and their trailers
GB/T 7922 Methods of measuring the colour of light sources
GB 15766. 1 Lamps for road vehicles – Dimensional electrical and luminous requirements

3 TERMS AND DEFINITIONS

For the purpose of this standard, the terms and definitions given in GB 4599-2007 and GB 4785 and the followings apply.

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