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The SAE International task force on headlamp mounting height has considered the ramifications of reducing the maximum mounting height of headlamps on highway vehicles. The task force has concluded that it is in the best interest of the driving public to make a substantial reduction in the recommended maximum height at which headlamps, particularly low-beam headlamps, may be mounted. Heights as low as 36 to 40 in (90 to 100 cm) have been considered. New tractor vehicles are in fact being designed with headlamps mounted in this range. Further recommendations were withheld in anticipation of tests to demonstrate the effect of mounting height on the legibility of certain overhead signs.

The Mounting Height Task Force was tasked to determine the extent of the problem(s) associated with vehicle headlamps mounted at or above the level of the mirror(s) in passenger vehicles; the level of glare exposure caused by high-mounted headlamps; the appropriate height differential needed to maintain a glare level consistent with past and/or current passenger vehicle headlamp mounting; and the necessary headlamp mounting height necessary to control mirror glare at an accepted/acceptable level. The report herein addresses these passenger vehicle mounting height issues.

This SAE Recommended Practice provides headlamp beam pattern test points for harmonized low and high beam headlamp beam patterns that incorporate elements of European, Asian, and U.S. photometric tables. These photometric tables are optional to those found in SAE J1383.

This SAE Recommended Practice applies to motor vehicle Distributed Lighting Systems (DLS) which use light generated by remote sources. It provides test methods, requirements, and guidelines applicable to these systems. This document is intended to be a guide to standard practice and is subject to change dependent upon additional experience and technical advances. This document covers Headlamp, Fog lamp, Auxiliary lamp, plus Signal and Marking lamp functions.

This SAE Recommended Practice provides headlamp beam pattern test points for harmonized low and high beam headlamp beam patterns that incorporate elements of European, Asian, and U.S. photometric tables. These photometric tables are optional to those found in SAE J1383.

The Mounting Height Task Force was tasked to determine the extent of the problem(s) associated with vehicle headlamps mounted at or above the level of the mirror(s) in passenger vehicles; the level of glare exposure caused by high-mounted headlamps; the appropriate height differential needed to maintain a glare level consistent with past and/or current passenger vehicle headlamp mounting; and the necessary headlamp mounting height necessary to control mirror glare at an accepted/acceptable level. The report herein addresses these passenger vehicle mounting height issues.