What color are the runway centerline lights in the last 3000 feet before the runway threshold?

The runway centerline lights exhibit a specific color pattern that changes as an aircraft approaches the runway threshold. In the last 3,000 feet before reaching the threshold, the centerline lights transition to a combination of red and white. This color scheme serves as a visual cue for pilots, indicating their proximity to the runway end while approaching for landing.

The white lights are positioned in the section further away from the runway, providing guidance during the initial stages of approach. As the aircraft gets closer, the lights transition to red and white, alerting the pilots that they are nearing the critical final segment of the landing process. This design effectively enhances safety and situational awareness by clarifying how close the aircraft is to the end of the runway. Understanding this light configuration is crucial for instrument flight and landing safety.