Why do pilots turn off cabin lights?

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Tags

1. #enough
2. #aircraft
3. #ensure
4. #event
5. #aisle
6. #dimming
7. #emergency
8. #outside
9. #safety
10. #crash
11. #lights
12. #adjusted
13. #evacuation
14. #floor
15. #happens
16. #measure
17. #leading
18. #gloom
19. #cabin
20. #along