Live data from Hacker News

Daily blue light shortens lifespan, causes brain neurodegeneration in Drosophila

nature.com

61–70 of 91 posts

Re: Daily blue light shortens lifespan, causes brain neurodegeneration in Drosophila

#62
post #61

On the other hand, a friend of mine who is a bio guy told me some wavelengths of light turn on some wound healing mechanisms in our body. I think it was 660 or 670 nm (red light)

Is that with retina or wound exposure?

Re: Daily blue light shortens lifespan, causes brain neurodegeneration in Drosophila

#63
post #13

I made a (what most people would consider terrible) vim color scheme that has no blue light in it (it's like an old amber terminal). Initially I thought I would hate it and switch back in a couple days/weeks, but I actually find it very nice, and switching to anything w/ blue light or a "normal color scheme" with blues and greens now weirdly feels like an assault. Feel free to give it a whirl: https://github.com/camg…

I've read that even a monitor with only warm-collided pixels displayed on the screen will still emit "blue light", in which case this wouldn't solve the problem correctly. I wonder if this is true?

I suspect this isn’t the case with an OLED, since it wouldn’t even emit any blue light in the first place if those pixels aren’t on. However, a typical laptop / monitor will have a white backlight that then gets blocked. Often there’s bleed through even if the screen is completely black.

If someone with more specific knowledge about screens corrects me, I yield to their judgment. :)

Re: Daily blue light shortens lifespan, causes brain neurodegeneration in Drosophila

#64
post #59
post #58

Blue Light FUD is an industry now. Although blue light exposure at night is detrimental due to melatonin blocking, during the day, it's important - both blue spectrum light and brightness. The fact that we spend most of the time indoors during the day is one of the reason of the wide incidence of myopia (shortsightness). I warned LensCrafters that they may expect class action lawsuits as they call blue light "harmful…

I thought that myopia was more of a genetic inherited trait than related to time spent indoors.

Myopia has become massively more prevalent over the last century, so we know there are environmental factors that are significant contributors to risk of contraction.

Re: Daily blue light shortens lifespan, causes brain neurodegeneration in Drosophila

#65
post #63

Earlier quoted context omitted.

I've read that even a monitor with only warm-collided pixels displayed on the screen will still emit "blue light", in which case this wouldn't solve the problem correctly. I wonder if this is true?

I suspect this isn’t the case with an OLED, since it wouldn’t even emit any blue light in the first place if those pixels aren’t on. However, a typical laptop / monitor will have a white backlight that then gets blocked. Often there’s bleed through even if the screen is completely black. If someone with more specific knowledge about screens corrects me, I yield to their judgment. :)

tech writer who specializes in TV screens here. You are indeed correct. With OLED, no bleed-through at all exists since there is no backlight and unless specific RGBW pixels on the screen are activated, they emit no light at all basically. On the other hand, even the absolute best consumer market LCD/LED screens leak at least some backlight glow, though in high quality models it becomes very faint due to local dimming zones and high quality light blocking.

Re: Daily blue light shortens lifespan, causes brain neurodegeneration in Drosophila

#66
post #61

On the other hand, a friend of mine who is a bio guy told me some wavelengths of light turn on some wound healing mechanisms in our body. I think it was 660 or 670 nm (red light)

Is that with retina or wound exposure?

wound. I found this article squirreled away:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4148276/

Re: Daily blue light shortens lifespan, causes brain neurodegeneration in Drosophila

#67
post #13

I made a (what most people would consider terrible) vim color scheme that has no blue light in it (it's like an old amber terminal). Initially I thought I would hate it and switch back in a couple days/weeks, but I actually find it very nice, and switching to anything w/ blue light or a "normal color scheme" with blues and greens now weirdly feels like an assault. Feel free to give it a whirl: https://github.com/camg…

Those who want this look (or other retro looks) in a terminal [1]

[1] https://github.com/Swordfish90/cool-retro-term

Re: Daily blue light shortens lifespan, causes brain neurodegeneration in Drosophila

#68
post #9

If you are a human and not a fly here is what concerns you "... humans are exposed to more blue-enriched LED illumination for most of the day, or even at night due to shift work and light pollution in large cities.6 However, long-term consequences of increased daily blue-light exposure across the human lifespan are not known." saved you a clickbait.

We do know however that shift work is absolutely terrible for your health.

Re: Daily blue light shortens lifespan, causes brain neurodegeneration in Drosophila

#69
post #59
post #58

Blue Light FUD is an industry now. Although blue light exposure at night is detrimental due to melatonin blocking, during the day, it's important - both blue spectrum light and brightness. The fact that we spend most of the time indoors during the day is one of the reason of the wide incidence of myopia (shortsightness). I warned LensCrafters that they may expect class action lawsuits as they call blue light "harmful…

I thought that myopia was more of a genetic inherited trait than related to time spent indoors.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5233810/

Re: Daily blue light shortens lifespan, causes brain neurodegeneration in Drosophila

#70
post #13

I made a (what most people would consider terrible) vim color scheme that has no blue light in it (it's like an old amber terminal). Initially I thought I would hate it and switch back in a couple days/weeks, but I actually find it very nice, and switching to anything w/ blue light or a "normal color scheme" with blues and greens now weirdly feels like an assault. Feel free to give it a whirl: https://github.com/camg…

Working on a compiler? Do tell!
Post reply on HN