Earlier quoted context omitted.
My impression was that HPS lighting became so widespread not because of the supposed advantages of its light spectrum, but because it was simply the most light-efficient technology available at that time. Here in Germany, only main/multilane streets requiring more lighting were using HPS, residential streets mostly had lamps with white fluorescent lights, so switching those to LEDs wasn't as much of a change. But sti…
Low pressure sodium lights were more efficient, but they emit a single wavelength of orange light. These lights were strongly disliked by people who liked to admire their car in the streetlights (I suppose). > residential streets mostly had lamps with white fluorescent lights, … they used CFLs? The spiral fluorescents were invented in the 1980’s, I guess. I speculate the residential street lights used mercury vapor b…
I can't vouch for Germany, but there used to be long, high-output fluorescent tubes and fixtures for street lighting in the US. They seem to have largely disappeared by the 1980s. They weren't very common, but some cities used them. They tended to be used on main streets when I saw them.