ICAO standards for obstruction lights
Chapter 6 of ICAO Annex 14 Volume I “Aerodrome Design and Operations”, ICAO regulates obstacle lighting’s photometric characteristics. Some recommendations are clarified about how to deploy obstruction lights for different heights of structures. Obstruction lighting’s intensity characteristics and recommended configuration are referenced from ICAO Annex 14 Volume I “Aerodrome Design and Operations”, 8th Edition, July 2018.