This was part of my suspicion, but I'm not familiar enough to know if that was correct.
> I get the impression the writer's opinions are extremely niche.
I'll be the first to say "citation needed" to what I'm about to say, but I feel like we went through a cycle of "the science is clear: blue light is bad for sleep!" to "actually a lot of that was not good science", so I'm unclear of where the consensus actually is (if I ignore this article).
As you may know, fluorescent lights are not used in museums because the UV light from them damages things. Incandescent lights were used for a long time, but I've been told that now LEDs are recommended because the emission spectrum is sufficiently safe. I'm wondering if blue pumped LEDs will cause a reversion.