I don’t use a blue light filter (my insomnia isn’t severe, but I’ve definitely been diagnosed). There is a palpable difference for me reading before bedtime with light text on a black background instead of black text on white. The gist of my comment was that the blue filter doesn’t matter. In fact, I’m sure the white text is emitting blue light. The point is that the total lumens is much more critical.

My experience has been widely anecdotally backed up in casual conversation in my life (including by a sleep specialist). The blue light stuff is a marketing ploy in my opinion. I’m mentioning blue light repeatedly because you highlighting this makes it seem like I failed to communicate my point. Dark mode, however, is universally a godsend (see “anecdotal evidence” acknowledgement).

Perhaps you’re not a reader? As an insomniac, the only excuse for not reading to fall asleep is ADHD or other focus problems. It’s too ideal a solution for insomnia not to be acknowledged in this context. Please forgive my inflammatory tone, but I tend to doubt you having severe insomnia (coupled with routine in-patient/out-patient sleep studies, medication, etc.) and not being able to follow the flow of my communication here. Having a hard time falling asleep and being diagnosed with severe insomnia are very different.