The city of Marseilles is estimating it will save €30K/year by turning the nighttime illumination of major buildings and monuments off an hour or so earlier, including the Palais Longchamps, which I've recommended visiting in past forum posts.
https://www.marseille-tourisme.com/en/discover-marseille/culture-heritage/discover-the-sites-and-monuments-in-marseille/palais-longchamp/
Noting this, Paris is proposing that the last sparkly light show on the Eiffel Tower be at 11:45pm rather than 1 am.
Would this cramp your style during a visit to the city of light?
I think perhaps maybe we here in the north American land of plenty don't have a good sense of just how pinched much of Europe is going to be this winter because of the Russian war on Ukraine and its effects on the energy markets and supplies. England and Germany are going to have even more trouble than France.
https://www.bbc.com/news/business-62831698
Even before the war things were looking pretty scary:
https://www.reuters.com/business/energy/uk-households-struggling-with-energy-bills-set-triple-think-tank-2022-01-17/