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AhaBulb: Stuff Everyone Should Know · ahabulb.com/pilot-anticollision-lights-day-night

If your airplane has anti-collision lights, when must they be on?

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  1. Only from sunset to sunrise
  2. Only in Class B airspace
  3. Day and night, unless off for safety

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References

  1. AIM Chapter 4 Section 3, Airport Operations www.faa.gov/air_traffic/publications/atpubs/aim_html/chap4_section_3.html Checked 2026-10-09.
  2. 14 CFR 91.209 Aircraft lights www.ecfr.gov/current/title-14/section-91.209 Checked 2026-10-09.

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