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Many of the lighting devices on motor vehicles are legally required and arc essential to safe operation on the highway. To maintain performance, it is important that the bulb and sealed unit types employed he readily available, when needed, throughout the country in normal service channels. Therefore, this SAE Standard lists an assortment of current popular types, together with their characteristics, which are recommended for use wherever practicable. It is recognized that because of constantly changing and improving technology, the list may be incomplete. Also, instances may arise in the design of some devices which require the employment of other types while achieving the desired performance.

This SAE Recommended Practice applies to motor vehicle signaling and marking devices which use light generated by a discharge source. This document provides test methods, requirements, and guidelines applicable to the unique characteristics of discharge lighting systems and their components. These are in addition to those required for signal and marking devices. This document is intended to be a guide to standard practice and is subject to change to reflect additional experience and technical advances.