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Blue light filters don't work – controlling total luminance is a better bet

neuroai.science

171–180 of 257 posts

Re: Blue light filters don't work – controlling total luminance is a better bet

#171

I found the basic premise of this blog post to be incredibly flawed. The author seems very sure of himself that blue light filters don't work, but making arguments related to cell types and emissions spectra and circadian rhythms is not the way to make a conclusive argument in a topic like this. Science is littered with recommendations about things that "plausibly" made sense, but that turned out to be flawed or just…

But you could make your same argument for the pro blue light filter side.

Re: Blue light filters don't work – controlling total luminance is a better bet

#172
post #89

Earlier quoted context omitted.

Are you sure you are not also changing total luminance?

They are, just, don't realize it. Anything off white will be need it need to be turning their monitor brightness down.

Best thing to do is use a scripting app that can make hotkeys for controlling monitor brightness. You can directly control the actual backlight of the monitor and lower it in the evening and at night. Same as pressing the physical button. Great when you have multiple displays

Re: Blue light filters don't work – controlling total luminance is a better bet

#174
I recall studies showing that reading in poor lighting conditions is a cause of myopia in children. So I'm questioning whether we want to be reducing luminance on our devices at all.

I like my (warm-coloured) lights and screens set to max brightness. I find it's easier to read and lets me work with more distance from the screen.

But what about easier sleep? Could we exercise more? Leave screens out of the bedroom? I have no idea.

Re: Blue light filters don't work – controlling total luminance is a better bet

#175
Best thing to actually do is use as dim a screen as possible closer to sleep. You can do this with external monitors using DDC and actually directly control the physical backlight of multiple monitors.

Also properly color calibrate your monitors

Re: Blue light filters don't work – controlling total luminance is a better bet

#176
post #174

I recall studies showing that reading in poor lighting conditions is a cause of myopia in children. So I'm questioning whether we want to be reducing luminance on our devices at all. I like my (warm-coloured) lights and screens set to max brightness. I find it's easier to read and lets me work with more distance from the screen. But what about easier sleep? Could we exercise more? Leave screens out of the bedroom? I…

Significant outdoor exposure is essentially the only relevant factor for preventing myopia. I would be interested in seeing any studies that showed any meaningful relevance of low light reading, while controlling for time spent outdoors.

Re: Blue light filters don't work – controlling total luminance is a better bet

#177
post #169

Earlier quoted context omitted.

Aggravatingly, you can't set Night Shift to actually be on 24/7. It always has a "seam" where it fades off and then turns back on. One trick is to schedule this as a bedtime reminder to put down the phone for the night (phone fasting).

I kind of despise that part about nightshift, since i almost always like to keep it at medium anytime indoors and during winter. But in the later evening I want it max, and when i got to bed i want it even more. And ive always despised flux for that too. It's even worse since a lot of times i sleep in two phases each night and it doesnt allow to change the length of night time. So dumb. In a way it's mildly frustrati…

Can’t f.lux be controlled from the command line? I seem to recall it can.

If so, you should be able to cron it to do whatever you want.

I was using redshift on Linux for a while and had some aliases set to trigger various settings.

Re: Blue light filters don't work – controlling total luminance is a better bet

#178

I have my phone in monochrome (i.e. greyscale) mode and just subjectively it's much easier to look at especially at night. I have it at the lowest brightness and it's still very readable. Human eyesight is basically monochrome in low light settings anyway.

I have an accessibility shortcut to turn my screen greyscale with triple taps but I kept turning it off so I could see the clues on sudoku and now I've forgotten I even had this for almost a year

Low brightness is great though. I didn't realize most of the battery drain on a phone is often just the screen. Lowering the brightness to as little as I need has been great for battery life

Re: Blue light filters don't work – controlling total luminance is a better bet

#179
post #120
post #105

Earlier quoted context omitted.

I find it somewhat pleasant, but by far the best thing I did to help my eye strain was greatly lower the brightness. Basically, I was told to make it so that my phone's camera could see something on the screen and my desk at the same time without washing out. After doing that, I have found that the "temperature" of the screen doesn't really matter to me that heavily.

> Basically, I was told to make it so that my phone's camera could see something on the screen and my desk at the same time without washing out +1. The low-tech version of this I've heard and I've been doing is: Hold a printed white paper sheet right next to your monitor, and adjust the amount of brightness in monitor so the monitor matches that sheet. This of course requires good overall room lightning where the pri…

There's some overlap with bias lighting here - good overall room lighting works if you've got good daylight, but it's much easier to get bright bias lighting at night than to light up the entire room.

Re: Blue light filters don't work – controlling total luminance is a better bet

#180
post #92

I replaced all the light switches in my house with smart dimmers and have the lights dim in the evening. It happens in steps so it's noticeable and it's like a clock ticking down. I don't know if there's anything scientific about it but it's pleasant, like the house is going to sleep so maybe I should too.

This is especially nice if you use bulbs that get warmer as they dim. (See the Kruithof curve.)
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