Which color of light is used to identify the edges of runways?

The identification of runway edges is primarily achieved through the use of white lights. White lights are strategically positioned along the edges of runways to provide clear visibility for pilots during takeoff and landing, especially in low visibility conditions. This consistent color standard helps pilots accurately determine the boundaries of the runway, ensuring safe navigation and operation of aircraft.

In aviation lighting systems, white lights typically outline the runway and are essential for guiding aircraft safely along their paths during critical phases of flight. This is why they have been adopted as the standard color for runway edge lighting.

Other colors, such as red lights, are used for specific warnings; green lights indicate the beginning of the runway; and yellow or amber lights are often used for taxiways and other indications. However, for the purpose of defining runway edges, white lights are the recognized standard.