Skip to page content
Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The latest general information on the Coronavirus (COVID-19) is available on For FAA-specific COVID-19 resources, please visit
United States Department of TransportationUnited States Department of Transportation

Lighting Systems - Light Emitting Diodes(LED)

LED green threshold lamp
Lighting systems provide pilots with the visual cues to quickly and positively identify the runway environment. They provide an extra margin of safety for approaching pilots. The FAA Lighting Systems Sub-Team (LST) is in the process of researching the use of Light Emitting Diodes (LEDs) in an Approach Lighting System (ALS) application. Feasibility studies, prototype development and an Operational Capability Demonstration (OCD) have been done to validate the requirements for using LEDs in ALSs. Incorporating an efficient lighting source in the ALS is critical in achieving the strategic objectives of the NAS Enterprise Architecture (NAS EA). Additional milestones remain to be accomplished and future activities for this endeavor are forthcoming. The completion of these milestones supports the LST in the continued evaluation of LEDs.

Page last modified: