I know this is subjective, but which color temperature do you guys use? I am on 3400K and 40% brightness day and night. Of course indoors. I wonder whether I am exaggerating, and a bit more blue light would be beneficial...
For some reason around sunset I start struggling more, and in the past with a "good" computer I never did...

24 days later

Hi, I did not read whole discussion, I just want to share my experience: I am using IRIS cca 1 year on notebooks Thinkpad T220 and E580. I like low brightness but on T220 & E580 Ive got headache after dimming my screen. With this app, it is quite better. I can use my notebook more than hour.

I did not use any other app, this is my first one (so I can not compare). What is good is, that I could install it without administrator rights (company computer).

It looks, that they dont use PWM for dimming, they just lower brightness of output (picture) on screen. The downsize of this is, that you can not use it for sharing the screen during meetings - projectors, webex or printscreens - they are all too dark.

Right now I have following settings: Windows 10. Laptop brightness on 100%: Iris settings 4485K / 39%.

Cheers.

CareUEyes does more or less the same (windows only) but with more clear pricing policy and better interface.

4 months later

Anyone using Iris? I would like to know which blue light / brightness settings you settled on. Recently I re-started playing around with them. I had been for a while at about 45% for both parameters and began wondering whether too little blue and too little brightness are not harming instead of helping. Thanks in advance for any comment!

    AGI I do use IRIS on my OLED phone but on a regular LED it doesn't really do anything. Anytime the pixel is black or grey you are getting full exposure to the black light. I don't even really notice any improvement on my phone either. Me personally I don't like bright screens.

    • AGI replied to this.

        jasonpicard Thanks. When you say you get full exposure, do you mean you are exposed to PWM? Was that measured?

            AGI https://forums.blurbusters.com/viewtopic.php?f=2&p=40984 This guy explains it best. There was another good article where the guy put a black image on the screen put flux on and measured it and it's full exposure to 380 UV and high amounts of blue light as is typical with LED. It does nothing. You are better off controlling Gamma and turning down the brightness. I believe you can get some relief possibly by changing the harsh white back ground of a website with a slight orange tint but that is a different issue not blue light related.

            • hpst replied to this.
            • AGI likes this.

                AGI I remember another guy measuring it on a Facebook group I used to be part of and said it was almost useless. It makes sense because LED on a black pixel is just a closed shutter.

                • AGI likes this.

                  jasonpicard You are better off controlling Gamma and turning down the brightness

                  What does changing gamma do differently than f.lux? Isn't that how it works by altering it? Did anything you read talk about Redshift or other color changing methods? Apparentl they don't all use the same method and it would be interesting to know if some did or didn't actually affect output.

                      hpst I have a gamma control on my monitor. It dims the back light and finally the brightness are the best ways to control the back light on an LED screen. I don't see how software can filter out blue light when you have a black pixel you get a closed shutter with back light bleed. LED doesn't display true black which is another crazy cause for eyestrain in dark scenes in movies and games. Maybe OLED if someone can prove it because each pixel is controlled. I'm willing to bet this conversation isn't going to matter much longer because OLED always has way less blue light then Regular LED.
                      https://www.whathifi.com/us/news/its-official-oled-tvs-really-are-good-for-your-eyes

                      https://eyesafe.com/dell/
                      Even Dell is releasing regular LED screens with a hardware solution in place. I'm willing to bet most people on this site won't be able to use these Dell screens because LED screens have 8 million other issues probably causing most of us worse pain then blue light. I would argue that these blue light software companies are pointless by next year because Dell will have all these other monitor makers and companies scrambling to catch up. If blue light is truly your concern we have options. CRT/Plasma/OLED/DLP If you still are worried using your LED screen thrown on some SCT orange glasses.

                      https://www.oled-info.com/reports-say-lgd-aims-change-its-woled-tv-structure-yb-rgb

                      It seems it was the 2018/19 models of LG OLED's that really started doing good with the low blue light from a hardware solution.

                      Next year when the JOLED models come out they should have less blue light as well because they are straight RGB from what I understand can't find the chart explaining as it was awhile ago I looked at it. Again this probably won't solve most people on this sites problems because OLED really only fixes 3 problems of the crazy list of LED problems. It will help some people though. If anyone knows more problems it will help with please let me know. I'm stuck in this crazy mess just like the rest of you.
                      Blue light
                      Fast GTG
                      True Blacks

                        2 years later

                        Pernichev i bought a flicker free laptop ASU’s zenbook pro 15 oled. However with my iPhone camera I can see it definately flickers and isn’t flicker free (flickers on photo/not video). I tried using the iris app - but whenever I reduce the brightness through the app it flickers again. Please can you advise.

                          dev