When I first visited Germany in 2002 I was amazed to see fluorescent lighting in service, as it was not something I was used to seeing. Fourteen years later, and Germany like other countries is seeing LED street lighting creep in. However, there are still oldies to be found, especially in Nordrhein-Westfalen, which was always particularly a fluorescent stronghold.
In the town where I stayed back in 2002, many of the columns have been lantern swapped with LED fittings. Previously most of the lanterns in the town were twin lamped, whether this were SON, mercury, fluorescent and compact fluorescent. They appear to have lantern swapped most of the SON and mercury in the town with LED, also moving towards a radio frequency switching at the same time rather than retaining the "whole town" group switching of before. Interestingly, where fluorescent lighting was present it has survived the lantern swapping.
In other areas there are similar stories. LED lantern swapping appears to be targeting things like mercury, twin lamp installations and main road lighting more, rather than there being blanket replacements. So, where there used to be mercury and fluorescent, it is interesting because the mercury fixtures seem to be the greater focus of replacements whilst the fluorescent fixtures live on.
Among the first fluorescents I saw all those years ago when I arrived in Germany were some 1950s or 1960s curvy concrete columns fitted with fluorescents in the town of Schwelm. A chance detour revealed that these concretes are still present in all their glory, and I don't think a single casual replacement has been made since the early 2000s.