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SESK: Stuff Everyone Should Know · sesk.info/aero-runway-edge-lights

What color are standard runway edge lights at night?

Runway edges are normally marked by steady white lights.

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  1. Blue
  2. White ✔
  3. Purple

Why: At night, steady white lights outline the sides of a runway. This helps pilots see the landing surface boundaries.

Huh, didn't know that: Taxiway edge lights are generally blue, helping pilots tell taxiways from runways.

The dad joke
Why did the runway lights stay in line? They knew their boundaries!
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References

Answer: White. At night, steady white lights outline the sides of a runway. This helps pilots see the landing surface boundaries.

  1. Civil Air Patrol, Journey of Flight Teacher's Guide www.gocivilairpatrol.com/media/cms/2nd_edition_Teachers_Guide_5D3166D76F9B1.pdf
    At night, runways have steady white lights on the edges
    Checked 2026-10-10.

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