What do the white lights on a runway mean?

Approach lights are the first lights that pilot will 'reach' during landing. They are of white color, unidirectional, blinking or steady type of lights. Approach lights are located prior to the runway. Their main function is to 'show' in what direction the runway is.



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The flashing lights help to make the airplane more noticeable. They have also been suggested to reduce the risk of bird strikes. This is offered as an option or add-on for many types of aircraft.

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The lights are dimmed in order to reduce electrical load.

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It can take the human eye between ten and 30 minutes to fully adjust to a newly dark setting. However, dimming cabin lights gives passengers and crew extra time to adapt to the lower-light conditions. This can be critical if an aircraft must be evacuated at night.

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