What do the runway edge lights turn to when reaching the last 1000 feet?

The runway edge lights indicate their colors based on the proximity to the runway's end, assisting pilots in visually navigating during the landing phase. When approaching the last 1000 feet of the runway, the edge lights change to red. This change in color serves as an important visual cue that the aircraft is nearing the end of the usable landing surface. The red lights signify to pilots that they should prepare for landing in a safe and controlled manner, as the runway is concluding.

Understanding the functionality of the runway edge lights is crucial for pilots to ensure a safe landing, especially in low visibility conditions. Other color designations serve different purposes, with green lights typically marking the beginning of the runway and being used in other phases of landing, while yellow often denotes caution areas such as taxiways. White lighting is usually employed for general runway marking rather than signaling imminent runway end. Hence, the correct answer regarding the last 1000 feet is that the lights turn red, helping to ensure pilots are aware of their position on the runway.