What is the minimum lighting required for runway operation?

The minimum lighting required for runway operation includes both runway edge and approach lights because together they provide essential visual guidance to pilots during takeoff and landing phases, especially under conditions of low visibility such as at night or in poor weather.

Runway edge lights define the edges of the runway and help in keeping the aircraft aligned with the runway during landing and takeoff. Approach lights serve as an additional visual reference for pilots as they approach the runway, crucial for ensuring a safe descent to touch down.

The combination of these two lighting systems is vital for enhancing safety and operational efficiency, particularly on runways that may not be navigated easily without sufficient lighting. This level of illumination is a regulatory requirement in aviation to maintain safe airport operations.