The City of Detroit converted all of their street lamps to LED a few years ago. Or I should say after almost 100 years, the City of Detroit gave up on trying to generate and distribute their own electrical power and handed it over to the local utility, Detroit Edison. Most of the street lamps had not been operating for as long as 20+ years ! Some areas of the city actually had their street lamps wired in series ! Detroit Edison completed the conversion a few years back
One thing about the new LED street lamps is that the reflector creates a much smaller "pool" of light. People in the neighborhoods noticed this, but nothing is likely to be done about it in the near future.