Which runway lighting component outlines the edges of runways at night or during low visibility and is classified according to the intensity they are capable of producing?

• A. Runway centerline lights
• B. RVV
• C. REIL
• D. Runway edge lights

Answer: (D)

Runway edge lights outline the edges of runways at night or in low visibility and are classified by the intensity they can produce. These lights run along both sides of the pavement, creating a clear boundary so you can perceive the runway width and avoid drifting off the edges when visibility is poor. Their brightness can be adjusted from low to high to match conditions, helping you maintain situational awareness as you align with the runway for landing or takeoff. Other lighting components serve different purposes, such as marking the centerline, identifying the runway threshold, or providing information about visibility, so they don’t outline the edges in the same way.