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LED lighting badly suppresses human melatonin production at night

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Re: LED lighting badly suppresses human melatonin production at night

#5
Andrew Huberman of Huberman Lab podcast discusses this in the first 4-5 episodes of the podcast. The takeaway is: it's late-night bright light, rather than blue light, that has effects on the circadian rhythm. It's an appeal to authority but I think I'll go with the professor of neurobiology and opthalmology on this one.

Re: LED lighting badly suppresses human melatonin production at night

#6
post #2

I have had led lights for over a decade. Come 10:30pm every night I'm falling asleep with no problem.

> Come 10:30pm every night I'm falling asleep with no problem.

I'd have said N=1 vs the study out there, but I too work with screens & LED lighting all the time & the "light spectrum" that affects me is not exactly the indoor component.

My personal theory is that the daytime to nightime being about the same lighting is what sucks. When the total range of lighting varies a lot, I don't feel as bad. A lot of my troubles have gone away with a sun room in my house, where I can get bright light without being exactly outdoor.

You might just have enough contrast in your day/night lighting for it to not matter to your perception.

Unlike a lot of the people who are either indoors all the time or just switch from an LED lit office to an LED lit living room after work.

Improving those with a proper sunlamp might be a good way around it, but they're expensive & sometimes feels like overkill.

Re: LED lighting badly suppresses human melatonin production at night

#7

Andrew Huberman of Huberman Lab podcast discusses this in the first 4-5 episodes of the podcast. The takeaway is: it's late-night bright light, rather than blue light, that has effects on the circadian rhythm. It's an appeal to authority but I think I'll go with the professor of neurobiology and opthalmology on this one.

He also did an interview with a person from the NIMH who personally only uses candle light past dark. It makes sense when you think about it.

Also apparently overhead lights are worse- the angle makes a difference.

Re: LED lighting badly suppresses human melatonin production at night

#8

This is a very long article and I didn't read it all, but I'm completely sure we can make LED bulbs which approximate the spectrum of incandescent if we want.

That is really the 'holy grail' of LED manufacturing, and we have not been able to do it yet.

See: CRI.

* https://en.wikipedia.org/wiki/Color_rendering_index

Re: LED lighting badly suppresses human melatonin production at night

#10
post #6
post #2

I have had led lights for over a decade. Come 10:30pm every night I'm falling asleep with no problem.

> Come 10:30pm every night I'm falling asleep with no problem. I'd have said N=1 vs the study out there, but I too work with screens & LED lighting all the time & the "light spectrum" that affects me is not exactly the indoor component. My personal theory is that the daytime to nightime being about the same lighting is what sucks. When the total range of lighting varies a lot, I don't feel as bad. A lot of my trouble…

>I'd have said N=1 vs the study out there, but I too work with screens & LED lighting all the time & the "light spectrum" that affects me is not exactly the indoor component.

Yeah my anecdote proves nothing. But for what ever reason they don't seem to impact my sleep. Just throwing my data point out there.

Also my wife hates the sharp white light so we always go for the warm yellow LEDs.

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