Greetings Bob:> Perhaps it is one of their regulations as all airlines seem to do it. It
> would appear the reasons have been lost on the mists of time as I
> expected quite a few people to respond to this question.
While there's no technical reason for dimming the lights after all have boarded the aircraft and you're getting ready for pushback, I do know that dimming the lights has a way for controlling the passengers. It's much like turning down the lights in a movie house--in an airplane, when the lights go down, folks tend to hush up and sit in their seats!
Best!
Ben
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