White Medium Intensity Obstruction Lighting Requirements

White Medium Intensity Obstruction Lighting Systems may provide conspicuity for structures in both day and night. White Medium Intensity Obstruction Lighting Systems may be used on structures of 500 feet AGL or less. This page contains an overview of white medium intensity obstruction lighting requirements as well as a list of applicable Advisory Circulars and Engineering Briefs.

AC 70/7460-1	Obstruction Marking and Lighting
AC 150/5345-43	Specification for Obstruction Lighting Equipment
AC 150/5345-53	Airport Lighting Equipment Certification Program
EB 67	Light Sources other than Incandescent and Xenon for Airport and Obstruction Lighting Fixtures
The latest Obstruction Lighting Advisory Circulars can be found at the FAA web site, www.faa.gov

FAA Obstruction Lighting Requirements – White Medium Intensity Obstruction Lighting Systems