Comment by rob74

> they used CFLs?

Nah, the lamps used (I assume) standard fluorescent tubes. Although honestly I don't know how widespread they were. They were (and still are in some areas) all over the place in Munich (and also e.g. here https://maps.app.goo.gl/M3RPqkN5MHZuPG7f7). Hamburg (https://maps.app.goo.gl/fPGfeEwWXtUGFnTL7) and Berlin (https://maps.app.goo.gl/kSemA2Md84AEJ9Py8) also have similar-looking ones.