blue light associated with prostate and breast cancer

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contactcr
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I’m not sure “lumens” is a good measure for this topic. After all, UV is zero lumens but damages your eyes.

Rusty Joe
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It may be the brightness of the LED, I’m convinced (if this is anything). If that is the case, WE ARE ALL SCREWED…but we ain’t changin’ a thang!!!

jon_slider
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another Denier Post Facepalm

watch, now he will answer and continue the denial

total hijacker Sick

nothing on topic to contribute

Deny, Justify, Deny.. = troll

"High CRI Lights for Sale":https://budgetlightforum.com/node/75426

Rusty Joe
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jon_slider wrote:
another Denier Post Facepalm

There are just some sacrifices that modern life does not allow us to make. And nothing we can do can offset “light cancer” if indeed it is a thing (e. g. we aren’t going to stop driving due to accidents).

hank
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Quote:
nothing we can do can offset “light cancer”

Wrong. Switching to luminaries that don’t suppress melatonin is an obvious way to reduce the impact.

Google wants to be your friend, you know.

Quote:

… reduced melatonin production has been reported among night-shift workers [10–12]. Consequently, the suppression of melatonin secretion by exposure to light during nighttime hours is surmised to be the main biological mechanism in the relationship between breast cancer and night work.Feb 6, 2018

The relationship between night work and breast cancer – NCBI

Unheard
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“we can’t do anything about…” means just “it’s the way it always was – never change a running system”. Kind of ok from some point of view, but imo we must continuously seek the best solutions. We’re clever humans.

Smile, you cannot kill them all.

Sari33
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Unheard wrote:
“we can’t do anything about…” means just “it’s the way it always was – never change a running system”. Kind of ok from some point of view, but imo we must continuously seek the best solutions. Were clever humans.

Yes, we are intelligent humans.But we are also 8 billion and some greedy and destructive, where the only goal is accumulate profit.Looking how the pluvial forest has been reduced and the pollution of water,air,earth with this stupid consumerist system and globalizzation
I’m not so optimistic
Rusty Joe
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hank wrote:
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nothing we can do can offset “light cancer”

Wrong. Switching to luminaries that don’t suppress melatonin is an obvious way to reduce the impact.

Google wants to be your friend, you know.

Nope. How are you going to get everyone else to not use, say, LED headlights on their vehicles? How about indoor lighting, more “cancer lighting?” You can’t do it, even if you give up your angry blue throwers. You see?

Lightbringer
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I can see aftermarket “blue-blocker” filters becoming available to slip over indoor lights, etc.

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sochi111
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Would glasses with red lenses count as a good filter?

or is it the other way, you want Blue lense to filter blue light?

Rusty Joe
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The last several nights, I’ve turned my Chromebook, Mac Book Pro, Tablet, and phone on “night mode” and adjusted the sensitivity toward extreme warm. Now, I’m not only adjusted, but I immediately felt the muscles in the back of my eyes relax. No joke.

I don’t yet think that blue light causes cancer, but I’m man enough to admit when I’m wrong. Ocular problems from blue light are, on the other hand, much more believable. What I’m saying is, I’m interested now and want to research this more.

hank
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Quote:
You can’t do it

You can reduce your total exposure. You can wear driving glasses with a blue-blocking tint. You can put a Rosco amber theatrical filter gel over your monitor or television.
And you can choose your own indoor lighting to reduce the exposure to blue-containing light for late evening hours.
You can be aware when your city puts in LED street lighting, for example: https://www.google.com/search?q=europe+%22blue+light%22+standards

Harvard has updated their early review of the issue: https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side

Lightbringer
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I actually kinda miss those 0CRI pinkish merthiolate-colored streetlights from a ways back.

Couldn’t tell blue from green from black…

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Unheard
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Rusty Joe wrote:
I don’t yet think that blue light causes cancer, but I’m man enough to admit when I’m wrong.

Not sure what causes cancer in nightshifters (if studies are right). Maybe breaking the natural cycle is the culprit, be it melatonin per se or just the missing sleep caused by its supression. But there are quite some studies by now.

No night mode in my old Android devices, but there’s an app. I got so used to it that I never switch it off. My Win10 laptop also is constantly in night mode, but mainly because the display is quite blueish.

Not missing CW.

Smile, you cannot kill them all.

Sirstinky
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wle wrote:
sorry that has to be bogus.

Definitely not bogus. Our bodies are very sensitive to certain wavelengths of light. The study focused on the bluer side of the spectrum, like 6500k and up. It is proven that cooler light can trick our bodies into thinking it’s daytime-which can disrupt our sleep-wake cycle or circadian rhythm, which when that is disrupted causes all kinds of other issues, including systemic ailments. The prevalence of LED streetlights with the cooler light caused issues for drivers (excessive glare and also sleep difficulty) so they had to switch them to warmer light, closer to 4000k and lower. Same with your mobile phone, which emits blue light (especially for LCD’s). Now phones have a mode that makes the screen warmer at certain times. Same with my laptop pc.

wle
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i would be highly dubious that a flashlight can make enough blue light, long enough, to make any difference.
or a cell phone screen.

how could that ever be proved?

cell phones and pcs have ‘night mode’ only because
a. it is free and
b. it is also FOM fad of the moment

there
i said it
hmph

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wle
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wouldn;t THE SUN have 100000 times more ‘blue light’ than any puny screen or flashlight?

wle

"You never have the wind with you - it's either against you, or you're having a good day."
    Daniel Behrman, "The Man Who Loved Bicycles".
It never gets easy, you just go faster.   
-Greg Lemond.
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Have had blue incandescent flood lights behind my plants in our living room for 39 years and am still alive and sleeping perfectly.  Now I have switched to  royal blue leds which look amazing and still fall asleep almost instantly.  Only had the rb leds for a month or so but hasn't affected our sleeping patterns in the slightest.  Need to do more research but maybe it is the cold blues that cause all the trouble?

lightdecay
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Royal blue, which is typically around 450nm, is definitely the right wavelength to suppress production of melatonin. According to the paper below, peak suppression is around 460nm.

Circadian photoreception: ageing and the eye’s important role in systemic health

A 10-year-old child has circadian photoreception 10-fold greater than a 95-year-old phakic adult. A 45-year-old adult retains only half the circadian photoreception of early youth.

There are other factors worth considering that are not mentioned in your post.
(1) Age, and how much your eye lens has yellowed over time.
(2) How bright your royal blue leds are, and how much of that light enters your eyes.
(3) Other lights you use at home, how bright they are, and their color temperature and blue peak.
(4) How much your sleep patterns vary from day to day, whether you use an alarm, and if you get enough sleep.

Depending on the above, it is possible blue light from your royal blue leds does not impact you at all.

klrman
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Over 60 and eyes seem to be getting better but I do consume a lot of carrots.  My night vision now is better than 20 years ago, other than that I have not noticed anything better or worse.

I don't know how bright my RB leds are.  I have them on at about 50% output for 2 hours every night, they are Cree XT-E's

Most other lights in our house if not colored are 3000K with kitchen at 4000K.

No sleep pattern with myself.  Whatever time I decide to go to sleep I fall asleep rapidly.

Maybe if I shine the RB directly into my eyes every day I'm sure I'd probably notice something but I don't do that with any of my lights.

Alen
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wle wrote:
wouldn;t THE SUN have 100000 times more ‘blue light’ than any puny screen or flashlight?

wle

That’s why you are awake on the day
Sunlight contains lot of blue light and stimulates the production of hormones by our body glands.
Blue/White light in the evening deludes the brain that it is daytime, which inhibits the production of melatonin,result is difficult to sleep.
This depends by many factors like amount of light,age,sensitivity.
Of course the darkness is the best allied for sleep
A source of light (and heat) natural and primordial that I like at night is the embers.

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