Evaluation of Improved Runway Edge Lights

The purpose of this activity was to evaluate a newly designed runway edge light fixture using a 100-watt" lamp as its light source, rather than the standard 200-watt lamp, to determine if a lower wattage lamp would satisfy category I and category II low-visibility operations.

Laboratory and actual low-visibility flight tests were conducted on the new fixtures. The results of the laboratory tests show that this fixture with the 100-watt lamp nearly meets the requirements of FAA Specification L-862. By minor changes in the optics, lights suitable for type L-862 requirements may be obtained.

Results of the flight tests indicated that the 100-watt lamp was adequate for category I weather operations, and it was felt that the system would support category II operations, as the light output appeared well balanced with the other runway light systems.

This report is the final report of a series that includes interim reports, FAA-RD-74-128, "Evaluation of an Experimental Elevated High-Intensity Runway Edge Light," and FAA-RD-74-171, "Elevation of 'an Experimental High Intensity, Inset Runway Edge Light Fixture."

Author: Raymond E. Johnston