What color are runway edge lights typically, except in the last 2,000 feet or half the runway length?

Runway edge lights are typically white to indicate the boundaries of the runway and help pilots determine the usable width of the runway during both day and night operations. These lights are positioned along the edges of the runway to enhance visibility and safety, particularly in low-light conditions.

However, in the last 2,000 feet (or half the runway length, whichever is less) of the runway, the lights change to red. This red coloring signals to pilots that they are approaching the end of the runway, serving as a critical warning in their landing approach. The contrast of white lights for the majority of the runway followed by red lights at the end ensures that pilots can quickly identify the transition zone between the runway and the runway safety area.