Definition
Blue-colored lights set along the edges of airport taxiways to mark their lateral limits at night and in low-visibility conditions.
Plain English
Blue lights line the sides of taxiways at an airport so pilots can see where the taxiway ends and the grass or pavement beyond it begins.
Context Anchor
Seen during night operations, taxi, preflight planning, and airport lighting discussions.
Why Pilots Care
Following the correct colored lights prevents runway incursions and keeps the aircraft safely on paved surfaces at night.
Intuition Check
Blue lights are not just general decoration or background airport lighting. At an airport, blue edge lights usually mean taxiway or ground-movement area, not runway.
Example Sentence 1
After landing, the pilot followed the blue lights along the taxiway back to the ramp.
Example Sentence 2
During the preflight briefing the CFI reminded the student that blue lights outline taxiways while white lights outline the runway.