QL lamps are in the old city part of Gdańsk, they are indeed nice.

In our city we have one QL 85W/830 which still works since its installation in 1996!

That's about 90 kh, not bad for a real-life situation. In Eindhoven, the QL systems we ran in our testing facilities well exceeded the 100 kh mark. If this is not a proof that electronic ballasts/systems can be made to last, then I don't know what is.

That's about 90 kh, not bad for a real-life situation. In Eindhoven, the QL systems we ran in our testing facilities well exceeded the 100 kh mark. If this is not a proof that electronic ballasts can be made to last, then I don't know what is.

Yes but there is even better, we have hundreds of fluorescent ballasts continuously since 1991 in the under pass of the main train station. Rarely I have to replace such ballasts.

True, but on a system level the QL has required much less maintenance than any of your standard fluorescent systems.

Yes as it does not contains any electrodes it only needs cleaning and checking the electrical/ mechanical safety every fife years.

What lovely shot. Is this at dawn or dusk?

Thanks Cole it is. I am still amazed by the camera of my Xiaomi 9SE mobile phone. It has a Sony 46 megapixel sensor which uses a cluster for every 4 pixel to increase light sensitivity and noise reduction. So the final output is 12 megapixel and I get also raw format to further edit in Photoshop. For a ligthing enthusiast its great to have a such a great camera always ready to shoot

In the top comment I've mentioned QL lighting in Gdańsk, recently I made photos of that installation:
https://www.lighting-gallery.net/gallery/displayimage.php?album=2822&pos=4&pid=170520
https://www.lighting-gallery.net/gallery/displayimage.php?album=2822&pos=3&pid=170521