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SESK: Stuff Everyone Should Know · sesk.info/drone-dark-adaptation-30-minutes

About how long do your eyes need to fully adapt to darkness?

About 30 minutes, and one bright light can undo it.

  1. About 30 minutes ✔
  2. About 5 minutes
  3. About 2 hours

Why: Your eyes need roughly half an hour in darkness to reach full night vision. Using a bright flashlight during preflight resets the clock.

Huh, didn't know that: Dim red lighting lets you reach a moderate level of dark adaptation in about 20 minutes.

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Sources

  1. Aeronautical Information Manual 8-1-6 https://www.faa.gov/air_traffic/publications/atpubs/aim_html/chap8_section_1.html

Test yourself in the game

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