Elevated Runway Edge Light Fixture Intensity Measurement

The Airport Technology Research and Development Branch was tasked to measure the luminous intensity output of incandescent, elevated, omnidirectional, medium-intensity runway edge lights and directional high-intensity runway edge lights (L-861 and L-862, respectively) in vertical areas between 15-90 degrees.

Luminous intensity measurements were conducted of each fixture in vertical areas between 15-90 degrees at 5-degree increments for vertical scan and 10-degree increments for horizontal scan. These measurements at nadir (0°, 0°) position were taken at the following current levels: three levels for L-861 type (6.6 amperes (A), 5.5 A, and 4.8 A), which is how the intensity steps 3, 2 and 1 were obtained, and five levels for L-862 type (6.6 A, 5.2 A, 4.1 A, 3.4 A, and 2.8 A), which is how the intensity steps 5, 4, 3, 2, and 1 were obtained. Resulting data was compiled and presented for the sponsors’ use.

DOT/FAA/TC-TN17/51
Author: Donald W. Gallagher