Runway Centerline Lighting System (RCLS) – On some precision runways, a runway centerline light system is installed, with white lights spaced at 50-ft intervals on the centerline of the runway. With 3,000 feet remaining, the white lights change to alternating white and red, and then all red during last 1,000 feet.

Touchdown Zone Lights (TDZL) – Touchdown zone lights are steady white lights placed in two rows next to the centerline, starting at 100 feet and extending to the midpoint of the runway, or 3,000 feet beyond the threshold, whichever is less.