AIM Text
- Operation of approach light systems and runway lighting is controlled by the control tower (ATCT). At some locations the FSS may control the lights where there is no control tower in operation.
- Pilots may request that lights be turned on or off. Runway edge lights, in-pavement lights and approach lights also have intensity controls which may be varied to meet the pilots request. Sequenced flashing lights (SFL) may be turned on and off. Some sequenced flashing light systems also have intensity control.
Source: FAA Aeronautical Information Manual · current edition · paragraph 2-1-7.
Research Notes
AIM 2-1-7 covers In-Runway Lighting — centerline and touchdown zone lighting embedded in the runway pavement.
Runway Centerline Lighting (RCLL): White lights along the runway centerline. Visible only during low visibility. Become alternating white/red 3,000 feet from runway end, then all red 1,000 feet from end.
Touchdown Zone Lighting (TDZL): Two rows of transverse light bars, 100 feet on each side of centerline. Extend from threshold to 3,000 feet down the runway (or half of runway length, whichever is less). Used for landing in Cat II/III visibility.
Reference: AIM 2-1-7.