What should the lights be adjusted to after the final walkthrough is completed?

After the final walkthrough is completed, the lights should be adjusted to the outside condition. This is important for a number of reasons, the most significant being that it ensures the cabin's lighting reflects the natural light conditions outside. Doing so helps maintain a sense of comfort and orientation for passengers, particularly during landing or takeoff, when the transition from day to night or vice versa can be abrupt. Adjusting the cabin lighting to coincide with the outside conditions also prepares passengers for their arrival, allowing them to better acclimate to the environment they will be entering once the flight is over.

This practice also aligns with safety protocols, as maintaining proper visibility in the cabin is crucial during critical phases of flight such as approach and landing. By keeping the lighting consistent with the outside environment, it enhances both the safety and comfort levels for everyone on board.