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Chemists discover how blue light speeds blindness

phys.org

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Re: Chemists discover how blue light speeds blindness

#231

Post by rootusrootus »

jakemauer wrote: post #203
erikbye wrote: post #169

Earlier quoted context omitted.

Does that matter? It's built-in now, and that's why I commented. To raise awareness. If built-in features have you covered there is no point going third-party.

I understand where you're coming from but they don't have feature parity. Flux allows me to target much lower color temperatures than MacOS' built in "Night Shift" feature. That alone makes Flux worthwhile.

Does it take a long time to get used to that? For me, Night Shift at full warm makes some websites difficult to use due to the change in color. I can't imagine going even warmer.

Re: Chemists discover how blue light speeds blindness

#232

Post by Diti »

lphnull wrote: post #174
asdkhadsj wrote: post #49

Earlier quoted context omitted.

If it is the delay in dilation that causes the damage, I imagine it's exacerbated by constantly changing dilation as well. Ie, if I'm staring at my phone in the dark, I rarely keep focus on it. I often glance to the left or w/e, thus causing the screen to appear too bright again. Same for laptop-ing in the dark. I often find myself looking at keys, or thinking off in the distance, or w/e.

serious question: Why do people like to do work or leisure in pitch black rooms? Don't you feel clumsy, sleepy and uncomfortable when everything is dark? How can anybody go more than 10 minutes without needing to use vision to interact with their surrounding environment? I personally can't have the lights off even if I'm watching a movie. Maybe because I was raised without TV, I can't sit still for more than 20 minut…

Very personal answer to your serious question (sorry if it isn’t relevant for others): I can’t stand the stimulus caused by light (one of the problems that come with being part of the autistic spectrum). I wear sunglasses at work (because of the bright fluorescent lights above). Being able to work in the dark is a relief.

Re: Chemists discover how blue light speeds blindness

#233

Post by mohn »

anonytrary wrote: post #209
dsr_ wrote: post #177

Earlier quoted context omitted.

... but I don't put a 100% brightness screen in front of my eyes at night. Do people really do that? Don't they know how to adjust brightness? Indoors, I use about 30% brightness. As the day gets dimmer, that slides down to about 25%. If I'm reading something in bed, I start at about 10% and as my eyes adapt, go down to 1%. When I'm finding it hard to keep my eyes open, I take that as my signal to go to sleep. Am I r…

This isn't weird at all. I'm jealous of your 1%. The default low on my phone is maybe like 5-10% (I don't know how to check this), and it feels crazy bright when I'm in bed.

If you're on Android, I recommend Screen Filter[1] which will draw a semi transparent overlay on top of nearly everything (depending on the phone and/or OS version, it might not dim the status bar, bottom navigation buttons, lock screen, etc.). I use it a lot when reading at night, because the lowest brightness setting on my phone is also too bright for dark-adapted eyes.

[1] https://play.google.com/store/apps/details?id=com.haxor

Re: Chemists discover how blue light speeds blindness

#234

Post by sizzle »

herf wrote: post #136

f.lux author here, still slogging through the article. It is hard to understand the light levels used because they use "power" (uW, mW) from a laser, and not "irradiance" (uW/cm^2 or mW/cm^2), so which area they have concentrated that light over is hard to understand. All I can see is it is from a laser, so the irradiance could be extremely high. The human lens filters most light at the peak of the given spectrum for…

Thank you for many years of f.lux. How would you say it stacks up against Nightshift in iOS and macOS natively?

Re: Chemists discover how blue light speeds blindness

#235

Post by mapmap »

namibj wrote: post #115
Brakenshire wrote: post #78

Earlier quoted context omitted.

CRI unfortunately is not a good test, it still can produce very high ratings even when the spectrum is spiky.

95+CRI is an indicator for mostly lack of spikes. Look at Yuji (yujiintl.com), they seem to be the only ones selling actual high-CRI LEDs with sane pricing (i.e., no ideological markup).

I'd like to try one of these out, but at $20 per bulb it's a a bit steep. Are you able to comment how they compare to the Feit Electric 90+ CRI bulbs sold at Costco for a few dollars a bulb?

Re: Chemists discover how blue light speeds blindness

#236

Post by andymal »

mohn wrote: post #233
anonytrary wrote: post #209

Earlier quoted context omitted.

This isn't weird at all. I'm jealous of your 1%. The default low on my phone is maybe like 5-10% (I don't know how to check this), and it feels crazy bright when I'm in bed.

If you're on Android, I recommend Screen Filter[1] which will draw a semi transparent overlay on top of nearly everything (depending on the phone and/or OS version, it might not dim the status bar, bottom navigation buttons, lock screen, etc.). I use it a lot when reading at night, because the lowest brightness setting on my phone is also too bright for dark-adapted eyes. [1] https://play.google.com/store/apps/detail…

Shades is also a good app on android for dimming the whole screen much darker than the default slider will go.

Re: Chemists discover how blue light speeds blindness

#237

Post by wpasc »

Vesther wrote: post #223
wpasc wrote: post #156

Earlier quoted context omitted.

Thank you for your input, but I mostly want to thank you for f.lux. It has been one of my favorite things for a long time. It's silly how long it's taken companies to provide a native blue light filter and your product just kicks ass. If you guys ever wanted to figure out your app on a smart TV (or apple TV), I know there'd be a lot of thankful people! Also, I'd love to contribute to the ongoing dev of f.lux (I don't…

Check out the FAQ for a PayPal donation link: https://justgetflux.com/faq.html Huge thanks to the author from me as well!

Thanks for telling me :) Paypalling now

Re: Chemists discover how blue light speeds blindness

#238

Post by bb88 »

mafuyu wrote: post #110
priccis wrote: post #83

Earlier quoted context omitted.

I'm sorry I can't help you, but after reading an article posted here about melatonin I got interested in light therapy, but commercial devices are a bit expensive. Are you documenting your project?

Sure, it's not the most exciting project, but I might do a short writeup when I'm done. I originally purchased these nice LED strip bars with enclosure in blue[0], but after reading this site by the manufacturers of a commercial green therapy light[1], I was convinced to switch to turquoise/cyan. Turquoise isn't that popular so I wasn't able to find any strips/bars, and I got these individual 3W bead LED modules inst…

So those cyan LED's have a forward voltage drop of 3.2-3.6 volts. So you'd be looking at a 32V-36V 350ma power supply or thereabouts to hook them up in series.

If it were me, I'd probably run everything in parallel just to keep the voltages lower, and be able to use readily available power adapters.

Aliexpress has a PWM controlled constant current driver that takes 5-35V in and outputs 350ma max [1]. 10 of them are $20, so they're not too expensive.

At a forward voltage of 3.3V for the LED's, you'd be looking at slightly more than 1W per LED at 350ma (P = VI).

Those constant current supplies probably have an efficiency of maybe 66%, taking that into consideration, I would think a 12V 2A power supply would be enough to drive the entire thing. And that could be a wall wart that you get at the local hardware store.

[1] https://www.aliexpress.com/store/product/10PCS-A58B-1W-LED-D...

Re: Chemists discover how blue light speeds blindness

#239

Post by jensvdh »

herf wrote: post #136

f.lux author here, still slogging through the article. It is hard to understand the light levels used because they use "power" (uW, mW) from a laser, and not "irradiance" (uW/cm^2 or mW/cm^2), so which area they have concentrated that light over is hard to understand. All I can see is it is from a laser, so the irradiance could be extremely high. The human lens filters most light at the peak of the given spectrum for…

I suffer from chronic photophobia thanks to Uveitis. Flux allowed me to keep my job.

Re: Chemists discover how blue light speeds blindness

#240

Post by oceliker »

anonytrary wrote: post #209
dsr_ wrote: post #177

Earlier quoted context omitted.

... but I don't put a 100% brightness screen in front of my eyes at night. Do people really do that? Don't they know how to adjust brightness? Indoors, I use about 30% brightness. As the day gets dimmer, that slides down to about 25%. If I'm reading something in bed, I start at about 10% and as my eyes adapt, go down to 1%. When I'm finding it hard to keep my eyes open, I take that as my signal to go to sleep. Am I r…

This isn't weird at all. I'm jealous of your 1%. The default low on my phone is maybe like 5-10% (I don't know how to check this), and it feels crazy bright when I'm in bed.

For iPhones you can set a full screen “zoom” with low light filter on. It’s under Settings -> General -> Accessibility -> Zoom. Set the filter to Low Light, then turn on zoom, then double tap with three fingers to zoom out all the way.
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