本文件规定了用于前方照明的道路照明设备的卤素可更换光源的性能、材料、设计要求和设计指南。SAE J573中规定了适用于前向照明的无卤灯丝光源。本文件中使用的术语“远光灯丝”和“近光灯丝”仅指灯丝的典型用途，而不是指灯丝的强制性、排他性或通用功能。本SAE推荐规程定期更新，以跟上经验和技术进步的步伐。

This document establishes performance, material, and design requirements and design guidelines for halogen replaceable light sources used in road illumination devices for forward lighting. Non-halogen filament light sources suitable for forward lighting are specified in SAE J573. The terms ¿¿¿high beam filament¿¿¿ and ¿¿¿low beam filament¿¿¿ used throughout this document refer only to typical use, not to a mandatory, exclusive, or universal function of the filaments. This SAE Recommended Practice is periodically updated to keep pace with experience and technical advances.