I spent a year in my youth changing all fluorescent tubes in the Stockholm subway. I honestly hated it, couldn’t even talk about it for years. But now, with decades of years as filter, I can appreciate that I got to see more than the average commuter.

Very nice indeed. Perhaps you should grab that job again so you can bring your Leica down into those tunnels?!
I would have loved that, with the eyes I have today. I did photograph a tiny bit with my Nikon F2, the camera I had those days.