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"all religions, arts and sciences are branches of the same tree. all these aspirations are directed toward ennobling man's life, lifting it from the sphere of mere physical existence and leading the individual towards freedom." albert einstein

redshift and sleep better



if you are like most and use your computer at night, i'm sure you are familiar with the eye strain caused by the screen light, and also with not being able to shut down, both your computer and your brain for sleep.

you need to make yourself a favor by giving redshift a go. the idea behind it is simple; when the sun is down you shouldn't be staring at an immensely bright computer screen that is made to mimic sunlight. instead, your display's lighting should become warmer and softer, mimicking the lighting in your room.

this does not only prevent the eye strain of constantly looking at the brightest source in your surroundings, it also improves your sleep. having a high color temperature (aka blue light) tricks your brain into thinking it's still daylight, which makes it delay sleepiness and tiredness. this theory has been backed up by multiple studies, that showed that those subjected to lower color temperatures before sleeping in an equally lit room, had better stage 4 sleep than those subjected to higher temperature colors. simply put, cooler colors with a lower kalvin rating, means better stage 4 sleep, which means, better quality sleep!

"the popular treatments for sleep disorders today focus a lot on "blue light in the morning", and the consensus view seems to include avoiding blue light within two hours of sleep."

redshift handles this for you. from their website: "it adjusts the color temperature according to the position of the sun relative to your location. during twilight and early morning, the color temperature transitions smoothly from night to daytime temperature to allow your eyes to slowly adapt. at night the color temperature should be set to match the lamps in your room. this is typically a low temperature at around 3000K-4000 kalvin (default is 3700). during the day, the color temperature should match the light from outside, typically around 5500k-6500k."

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Comentarios

1
De: Aoirthoir An Broc Fecha: 2011-03-29 19:10

It's a good idea, except I'm nocturnal. So I should turn my computers LCD up when I want to sleep:D



2
De: jeff Fecha: 2011-03-29 21:28

I'm not convinced that there is not a huge placebo effect going on, as we're only shifting the color temperature and not the actual brightness.

I actually wrote a really silly python hack for laptop computers that changes the backlight brightness depending on the time of the day, and it seemed much better while preserving color fidelity.



3
De: luisbg Fecha: 2011-03-29 22:36

jeff, why not combine both? it would be ideal.



4
De: Ademeion Fecha: 2011-03-30 04:36

"...instead, your display's lighting should become warmer and softer, mimicking the lighting in your room."

This is an interesting topic, but: I don't quite understand what's natural in mimicking the lighting of my room, which is not natural light. If the time of going to bed is approaching, why not just use the colour temperature of the sun at the sunset? In addition, the colour temperature of the lamps varies greatly nowadays, as more and more people are using fluorecent lamps, LEDs, halogens and what-not. I also happen to live in the north (southern Finland), where sun goes down between 3 and 4 pm in the large part of the winter, so, according to this principal, I would have to set the monitor to mimick lamp light for a good part of the year. It doesn't sound natural to give lamp light for my eyes on the other part of the year and light of sunset on the other.

There seems to be an error with wording at the beginning of the third paragraph. I think there should be "only" in the place of the word "also".



5
De: Michael Fecha: 2011-03-30 09:57

Does not work with my external LCD monitor connected to my notebook



6
De: luisbg Fecha: 2011-03-30 11:35

ademeion, you can set it so it shifts to red around 10pm... i have it that way so it's constant all year. and thanks for the patch.

about the color temperature, natural light in sundown also shifts to the red. which is why in architecture you learn that bedroom lighting should be redshifted. the pure white bulbs are for spaces that don't have good light during the day, like offices.

michael, send them a bug report, they will appreciate.



7
De: Rohit Sharma Fecha: 2018-09-04 09:45

Very usefull article thanks ... keep writing such articles :)
I'm so happy bcoz you are write this post for everyone thnxx a lot


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