I've tried searching the forums and Google for this, not sure it's got much coverage.
Does anyone find that light pollution diminishes as the night wears on? As the general population goes to bed, turns off house lights, cars stop being driven, shops and factories shut down...
In my area, they even turn off most of the street lights on quiet residential streets after midnight.
However, I'm 30 mins train ride from the centre of London - this is lit up so brightly at all times that when I lived there and got used to the brightness I was actually confused about the darkness at night when I visited my parents at Christmas. It was so unfamiliar to walk around in the dark!
So anyway I'm not sure if the proximity of London means that local lights being turned off have little effect.
What's anyone else's experience?