A programme is underway to replace all of the streetlights in Gloucestersire with LED lamps. I understand that dimming will occur between 10pm and 5am for some, whilst others will be switched off after midnight. Gloucester is among the first locations to undergo the switch, and the county council intend to assess any change in skyglow photographically.
My own location seems to be as much affected by the illumination of businesses and sports facilities as by streetlights. Nevertheless the Gloucestershire programme is a significant development.