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

Runway edge lights play a critical role in aviation by helping pilots navigate during takeoff and landing, especially in low-visibility conditions. When an aircraft is approaching the runway, the last 1000 feet of the landing strip is marked distinctly with specific lighting to provide visual cues for pilots.

In this case, the lights at the very end of the runway transition to red as the aircraft reaches the last 1000 feet. This color change is intentional, serving as a warning to pilots that they are nearing the end of the runway. The red lights emphasize caution, indicating to pilots that they are in the final phase of landing and should prepare for a stop or any last-minute adjustments required before they conclude their approach.

This visual cue is crucial for safety, as it assists pilots in understanding their proximity to the end of the runway, helping to prevent overshooting in the landing process. The previous sections of the runway would typically feature white lights, but the change to red indicates imminent termination of the usable runway area.