What colors do runway centerline lights display, except for the last 3,000 feet?

Runway centerline lights are designed to enhance visibility and provide guidance to pilots during takeoff and landing operations, particularly under low visibility conditions. They are positioned along the centerline of the runway and play a significant role in indicating the runway's alignment and ensuring safe aircraft operations.

In general, these lights display white throughout the majority of the runway length. However, as an aircraft approaches the end of the runway, the lights change to red starting at 3,000 feet to signify that the end of the runway is near. This transition serves as an important visual cue for pilots to take caution as they prepare for landing or need to decide about go-arounds.

Therefore, the correct answer, which states that runway centerline lights display white, is accurate because this is the primary color exhibited over the majority of the runway length. The focus on white lighting helps ensure pilots have a clear visual reference when aligning for landing. The specific change to red as they near the final 3,000 feet of the runway serves as a crucial transition point that enhances safety and awareness during critical phases of flight.