For the past year I've been switching all of the apps and sites that I use to dark mode. I know there are conflicting reports on the energy savings delivered. I also know that on one of my screens it won't make a difference to power consumption at all. However, I just want to get used to it so that when I upgrade various bits of tech to versions that will benefit, I'm already there.
I have found that it's actually a lot easier on my eyes. I strongly recommend that you try it.
https://www.purdue.edu/newsroom/releases/2021/Q3/dark-mode-may-not-save-your-phones-battery-life-as-much-as-you-think,-but-there-are-a-few-silver-linings.html
#darkmode