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Is there any good info on this anywhere? I find it difficult to find useful info even among different search engines.

I am pretty sure the daylight type of LED light will be bad to use late into the night. (Just as you had pure sun light at that time, but the spectrum of LED light is more artificial.)

EDIT

6 hours in - I like all the comments so far, upboats for everyone!

So there are LEDs that do a more full spectrum. That has to be good progress and make them a good light source for homes. I agree that flickering may be 'bad' (don't know how or where or how to define, but steady light would be better I think) but gas-discharge (e.g. tube light) has been in use for many decades without problems that we know of (again, I think) - but they are mostly used in work environments. Gas-discharge in homes is now in use for many years also. One thing about them is, they flicker too, but at 100 or 120 Hz. And I think the only reason LEDs flicker is to have some control over their brightness (LED brightness is practically uncontrollable by current alone.)

I guess the main thing I meant to say is, would anyone go back to incandescent? Or has anyone gone back to incandescent, and found out that they feel better?

Is there any good info on this anywhere? I find it difficult to find useful info even among different search engines. I am pretty sure the daylight type of LED light will be bad to use late into the night. (Just as you had pure sun light at that time, but the spectrum of LED light is more artificial.) EDIT 6 hours in - I like all the comments so far, upboats for everyone! So there are LEDs that do a more full spectrum. That has to be good progress and make them a good light source for homes. I agree that flickering may be 'bad' (don't know how or where or how to define, but steady light would be better I think) but gas-discharge (e.g. tube light) has been in use for many decades without problems that we know of (again, I think) - but they are mostly used in work environments. Gas-discharge in homes is now in use for many years also. One thing about them is, they flicker too, but at 100 or 120 Hz. And I think the only reason LEDs flicker is to have some control over their brightness (LED brightness is practically uncontrollable by current alone.) I guess the main thing I meant to say is, would anyone go back to incandescent? Or has anyone gone back to incandescent, and found out that they feel better?

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[–] • 0 pt

I remember the time of mass replacement of incandescent. "A little more expensive, but they'll last you a decade!" You know how this went. Feeling ripped off also impacts mental health...

[–] • 1 pt

I actually had better luck with CFLs than I've had with LED. I used one in my room for 14+ hours a day and it lasted for years. LED bulbs tend to only last a year or two.