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F.lux save your eyes but does it work?

f.lux os x computer screen imac

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#16 ndoggfromhell

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Posted 15 January 2013 - 19:15

Installed on my work mac (when it turns on I know i've got 30 minutes left in my work day) and I have it running at home. Definitely helped my eyes a lot. Been using for 5 months and wouldn't do without it.


#17 Shadrack

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Posted 15 January 2013 - 22:34

OR you could all just run your screens at the proper warm color setting instead of the terrible wrong colors cold setting every monitor, OS and tv is set to by septa dared today.

Turn down contrast, turn down brightness, set to warm color. Enjoy comfortable proper colors n your screen.


It does seem that the whole industry is trying to convince me that blue is the new white....

#18 bitbucket

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Posted 15 January 2013 - 22:47

Use it for a week and then at like 10pm disable it and you'll soon understand why it helps lol. I love it - installed at work and home.

#19 Shadrack

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Posted 15 January 2013 - 22:56

How to know that f.lux works:

1) Use f.lux for a week.
2) Disable f.lux at 11 pm
3) Be blinded by the intensity of your suddenly very-blue screen.

Before flux, your eyes endured that every night.


This. Well said.

#20 Shadrack

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Posted 15 January 2013 - 23:02

I have night mode at 4200k. It the difference in color was noticeable at first but not once I got used to it.

I don't think I've ever seen an attempt at doing a study on the effectiveness of the program though. It could the placebo effect everybody is experiencing like those magic bracelets..


No, I wouldn't describe it as a placebo. People who use it are always struck by the odd colors at first but then they find that they like the adjustment into the evening. If someone "likes" what it is doing, and it is doing *something*, then it will have net-positive effect and that can't be chalked up as placebo.

If installing f.lux didn't make an obvious change at all to anything but claimed to do something and people agreed that it did "something" then that might be placebo.

How effective is it for sleep patterns? Idk exactly. I think it helps but it is probably hard to isolate. As other have said, use it for a week, turn it off and make observations about how your eyes feel. When I do that, my eyes feel more stressed looking at the default white balance than the adjusted white balance f.lux provide. That's not a placebo, that is real nerves firing in my eyes and sending signals to my brain.

#21 insomniac9

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Posted 15 January 2013 - 23:13

I've installed it on my laptop, will be installing it at work tomorrow. I will use it for a few weeks to see if my eyes feel less strained than they are usually.

#22 Detection

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Posted 15 January 2013 - 23:48

It makes my screen look like an old CRT that some old guy has smoked 60 a day in front of

Easier on the eyes, yes, easier on the brain, no.

Plus my LCD doesn't have great viewing angles so the top looks brown and the bottom looks yellow

#23 +MikeChipshop

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Posted 16 January 2013 - 00:13

OR you could all just run your screens at the proper warm color setting instead of the terrible wrong colors cold setting every monitor, OS and tv is set to by septa dared today.

Turn down contrast, turn down brightness, set to warm color. Enjoy comfortable proper colors n your screen.


I'm a designer, my monitor is calibrated exactly as it should be and this program makes a hell of a difference at night when the computer is used for development or reading. Couldn't live without it. If i hit the disable for an hour button now, i can feel my eyes reel back in horror.

#24 Seketh

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Posted 16 January 2013 - 00:15

I've been using it for over a year now and it's one of the first apps I download on a new Windows install.

If it's excessively yellow, just bring it up to 4300k (fluorescent). It depends on the monitor you use it on. Also, for new users, change the setting from 20 seconds to 60 minutes, it's easier on the eyes the first few days.

It's definitely not placebo though, the difference is quite dramatic after using it for an extended period, I am now unable to live without it.

(Maybe I'll just try to disable it for a second and see if it's still workinokopolç,iasdfçoasdmfsa OH GOD IT BURNS!)

#25 The_Decryptor

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Posted 16 January 2013 - 00:17

It does seem that the whole industry is trying to convince me that blue is the new white....

You're supposed to set the temperature of your monitor to match the ambient lighting, warm matches incandescent bulbs (that turn everything yellow) and cool should match the colour of daylight (and fluorescent lighting if you got the right bulbs).

That said, on my monitor "normal" matches daylight while cool does turn everything slightly blue, so I just don't think they have any idea.

#26 Shadrack

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Posted 16 January 2013 - 00:49

You're supposed to set the temperature of your monitor to match the ambient lighting, warm matches incandescent bulbs (that turn everything yellow) and cool should match the colour of daylight (and fluorescent lighting if you got the right bulbs).

That said, on my monitor "normal" matches daylight while cool does turn everything slightly blue, so I just don't think they have any idea.


I realize that when it comes to monitors. My experience is with an iPhone. Most smartphones do not allow you to adjust the white balance in their stock form. iOS needs to be jailbroken and Android needs to be rooted with a custom kernel to set color profiles.

Also, f.lux addresses the need for the monitor's white balance to be adaptive to the time of day. The white balance for me in the evening does shift more to the red than during the day especially if a room lets in any ambient light.

So yeah, most things are calibrated to be used during the day. At night everything turns blue because of that.

#27 The_Decryptor

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Posted 16 January 2013 - 04:22

We've replaced all our bulbs with daylight CFLs a while back, so I'm lucky in that regard (Middle of the day or 9pm at night, the same colour temperature applies)

#28 Gotenks98

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Posted 17 January 2013 - 02:21

All I can say is wow this is a huge difference. Its so much easier on my eyes. I might switch to this for all my work pcs now. I did however notice on windows 8 machines it wont download due to being on a smart screen filter list.

#29 Detection

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Posted 17 January 2013 - 03:12

Clever how it doesn't alter the mouse pointer colour / brightness

#30 Reacon

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Posted 17 January 2013 - 03:15

I installed it a few weeks ago, and just toned down the colour difference to about 2/3 of the bar to "fluorescent." It seemed weird for the first day, but after a while I stopped noticing the change completely. Very natural and strains my eyes less.