Well… (Sorry, let me put my tinfoil hat on.) Yeah, well that noticed part is what is worrisome to me. I do worry that there is some effect on our brains even though we might not perceive the flicker.

As an analogy, I got into those supposedly audiophile "Class D" (or "Class T") amplifiers over a decade ago. Every day I turned on the music in my office and coded with the T-amp playing. I would have told you at the time that, indeed, it sounded amazing.

Some time later I built a tube amplifier (The Darling [2], in case anyone cares—I've since built perhaps a dozen more).

When I brought it into the office and swapped it out for the T-amp, the change was sublime but immediately noticeable. I hate to fall back on audiophile terminology but it's the best I have for the experience: I was suddenly aware of "listening fatigue" that had been a component of the T-amp. I hadn't even known it had been fatiguing until I heard the tube amp in its place for days on end.

With the loss of color fidelity and the flickering issue, I'm embarrassed to say that incandescent is starting to look good to me again.

I might, as an experiment, replace only those lights that we turn on in the evening when we are relaxing, reading.

[1] https://en.wikipedia.org/wiki/Class-T_amplifier

[2] https://www.diyaudio.com/community/threads/darling-1626-amp.... and https://imgur.com/gallery/oh-darling-tube-amplifier-Lq2Sx