7 ms·

I very much prefer working in cold white and whee I relax and rest there I prefer warm white. I think cold white helps me stay awake and more alert. It all migh

I very much prefer working in cold white and whee I relax and rest there I prefer warm white. I think cold white helps me stay awake and more alert. It all might be s placebo of course.

Cthulhu_ 7y ago
No that's actually proven science; white or blueish lights help you wake up / stay awake, whereas orange / red lights will help you relax / sleep / produce melatonin. It's why F.lux and the native solutions shift screens to red at night. It's really quite stark a difference if you turn that off at night.
- rapnie 7y ago
  Yes. It's also why you have the Blue Light Filter on your android phone (which I have always-on).
  - TheSpiceIsLife 7y ago
    I have it always on my iPhone and triple click home makes it even redder.
- behringer 7y ago
  It's far from proven science.
  - soulofmischief 7y ago
    Don't talk out of your ass: https://justgetflux.com/research.html https://justgetflux.com/research.html
    - bildung 7y ago
      There is no need to be rude if you got sources ;) I just looked at the newest article in your list ("Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness") and * there was no mention at all about blue light * the difference between sleep onset of treatment and control group was 10 minutes - with errors of +-13 and 19 minutes(!), ergo there was no measurable effect. Edit: It's important to have a look at the sun's spectrum: https://en.wikipedia.org/wiki/Sunlight#/media/File:Spectrum_of_Sunlight_en.svg https://en.wikipedia.org/wiki/Sunlight#/media/File:Spectrum_... As can be seen the absolute amount of dark blue to blue (380-500nm) is pretty high regardless of wheather conditions. Full daylight is about 10-20klux, so between 3000lux and 7000lux of blue light alone. For comparison: anti-depression lights are about 2000-3000lux over the whole visible spectrum. Yet people sleep perfectly fine in regions where the sun sets at 11pm in the summer. There obviously may be an effect, but if it exists, it has to be small.
      - soulofmischief 7y ago
        Parent was being rude by chastising OP with their stark, baseless claim. > I just looked at the newest article in your list Why don't you check out the dozens of studies below instead of committing selection bias?
        behringer 7y ago
        Yes because a selection of studies by a for-profit company are not biased. https://en.wikipedia.org/wiki/Effects_of_blue_light_technology https://en.wikipedia.org/wiki/Effects_of_blue_light_technolo...
        apatters 7y ago
        This is very interesting. I think a lot of us have come to believe the claim that blue light exposure keeps you awake. So what do we know? That excessive exposure to any kind of light at night keeps you awake? It looks like there are several studies on the f.lux page discussing blue light specifically, but fair point that they could be cherry-picking just the studies that support their product.
        soulofmischief 7y ago
        I have been using f.lux for a decade, since the first version, and it has been a huge benefit to me. So far all native OS implementations simply don't compare. f.lux is doing more than just filtering blue light from the color buffer. They may take donations, but when the project started it was a far cry from the company that exists today and it began with research, as opposed to cherry-picking research after the fact as OP is sort of insinuating. f.lux and Twilight for Android (inferior but best in class) massively contributed to the reduction of my late night migraines and insomnia. Try an experiment: code for a few hours late at night with f.lux set to match the white temperature in your room. You can do this by holding up a piece of printing paper next to your screen and matching the color. After a few hours, change f.lux to the default temperature. Take it as bright as it goes. Then put it back at a temperature which feels comfortable and natural to you. If this is the default color temperature, let me know.
  - authoritarian 7y ago
    There are lots of studies and articles discussing the affects of blue light on melatonin and sleep https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side https://www.health.harvard.edu/staying-healthy/blue-light-ha... https://www.sleepfoundation.org/articles/how-blue-light-affects-kids-sleep https://www.sleepfoundation.org/articles/how-blue-light-affe... https://www.healthline.com/nutrition/block-blue-light-to-sleep-better https://www.healthline.com/nutrition/block-blue-light-to-sle... https://brighamhealthhub.org/prevention/using-light-emitting-devices-before-bed-may-impact-sleep https://brighamhealthhub.org/prevention/using-light-emitting... https://www.scientificamerican.com/article/q-a-why-is-blue-light-before-bedtime-bad-for-sleep/ https://www.scientificamerican.com/article/q-a-why-is-blue-l...
    - behringer 7y ago
      https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pubmed/30311830 No real conclusions. It's appears to be a study aimed at making future studies better "The review enables further development of an evaluation method of light pollution in LCA regarding the light-induced impacts on human circadian system." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ No definitive conclusions: "Additional laboratory-based and field studies are still necessary to better understand some features of the human circadian response to light. We are only beginning to understand how prior exposure to light affects the subsequent response to a light stimulus, and our understanding of how light exposure can affect the period of the human circadian system is also limited (135)." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ Seems to be a review of other research by a journalist https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side https://www.health.harvard.edu/staying-healthy/blue-light-ha... news article, not science https://www.sleepfoundation.org/articles/how-blue-light-affects-kids-sleep https://www.sleepfoundation.org/articles/how-blue-light-affe... News article, not science I'd go through the rest but it's time for lunch.
    - 7y ago
goldenkey 7y ago
This is backed by science. Philips Hue uses warmer color temperatures for relaxation presets and colder brighter ones for energization. Anecdotally, the "energize" setting is too much for me. I usually just use Relax, a nice sunny yellow, unless I really need to focus and gear down hard.
- TheSpiceIsLife 7y ago
  I have a few Philips Choose Scene, or Scene Switch, whatever they’re called this week. They cycle between warm and cool when switched off and back on, but aren’t a connected device. I believe the latest incarnation has a dim and even warmer setting as well.
- bildung 7y ago
  > This is backed by science. It wasn't at all when I looked into it last year. Can you point me to new research in this area?
  - goldenkey 7y ago
    Look at bulb spectra: https://www.researchgate.net/profile/Fawzia_Abdel-Rahman/publication/312320039/figure/fig1/AS:670209421623301@1536801786500/Emission-spectra-of-different-light-sources-a-incandescent-tungsten-light-bulb-b.png https://www.researchgate.net/profile/Fawzia_Abdel-Rahman/pub... Any reptile or bird owner can easily attest to the effectiveness of full spectrum light on a living being.
SaturateDK 7y ago
That's why I'm pretty happy with my smart lights, they can change kelvin rating, so while working it can be blueish, and later on more warm.

I very much prefer working in cold white and whee I relax and rest there I prefer warm white. I think cold white helps me stay awake and more alert. It all might be s placebo of course.

Cthulhu_ 7y ago

No that's actually proven science; white or blueish lights help you wake up / stay awake, whereas orange / red lights will help you relax / sleep / produce melatonin. It's why F.lux and the native solutions shift screens to red at night. It's really quite stark a difference if you turn that off at night.

rapnie 7y ago
Yes. It's also why you have the Blue Light Filter on your android phone (which I have always-on).
- TheSpiceIsLife 7y ago
  I have it always on my iPhone and triple click home makes it even redder.
behringer 7y ago
It's far from proven science.
- soulofmischief 7y ago
  Don't talk out of your ass: https://justgetflux.com/research.html https://justgetflux.com/research.html
  - bildung 7y ago
    There is no need to be rude if you got sources ;) I just looked at the newest article in your list ("Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness") and * there was no mention at all about blue light * the difference between sleep onset of treatment and control group was 10 minutes - with errors of +-13 and 19 minutes(!), ergo there was no measurable effect. Edit: It's important to have a look at the sun's spectrum: https://en.wikipedia.org/wiki/Sunlight#/media/File:Spectrum_of_Sunlight_en.svg https://en.wikipedia.org/wiki/Sunlight#/media/File:Spectrum_... As can be seen the absolute amount of dark blue to blue (380-500nm) is pretty high regardless of wheather conditions. Full daylight is about 10-20klux, so between 3000lux and 7000lux of blue light alone. For comparison: anti-depression lights are about 2000-3000lux over the whole visible spectrum. Yet people sleep perfectly fine in regions where the sun sets at 11pm in the summer. There obviously may be an effect, but if it exists, it has to be small.
    - soulofmischief 7y ago
      Parent was being rude by chastising OP with their stark, baseless claim. > I just looked at the newest article in your list Why don't you check out the dozens of studies below instead of committing selection bias?
      - behringer 7y ago
        Yes because a selection of studies by a for-profit company are not biased. https://en.wikipedia.org/wiki/Effects_of_blue_light_technology https://en.wikipedia.org/wiki/Effects_of_blue_light_technolo...
        apatters 7y ago
        This is very interesting. I think a lot of us have come to believe the claim that blue light exposure keeps you awake. So what do we know? That excessive exposure to any kind of light at night keeps you awake? It looks like there are several studies on the f.lux page discussing blue light specifically, but fair point that they could be cherry-picking just the studies that support their product.
        soulofmischief 7y ago
        I have been using f.lux for a decade, since the first version, and it has been a huge benefit to me. So far all native OS implementations simply don't compare. f.lux is doing more than just filtering blue light from the color buffer. They may take donations, but when the project started it was a far cry from the company that exists today and it began with research, as opposed to cherry-picking research after the fact as OP is sort of insinuating. f.lux and Twilight for Android (inferior but best in class) massively contributed to the reduction of my late night migraines and insomnia. Try an experiment: code for a few hours late at night with f.lux set to match the white temperature in your room. You can do this by holding up a piece of printing paper next to your screen and matching the color. After a few hours, change f.lux to the default temperature. Take it as bright as it goes. Then put it back at a temperature which feels comfortable and natural to you. If this is the default color temperature, let me know.
- authoritarian 7y ago
  There are lots of studies and articles discussing the affects of blue light on melatonin and sleep https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side https://www.health.harvard.edu/staying-healthy/blue-light-ha... https://www.sleepfoundation.org/articles/how-blue-light-affects-kids-sleep https://www.sleepfoundation.org/articles/how-blue-light-affe... https://www.healthline.com/nutrition/block-blue-light-to-sleep-better https://www.healthline.com/nutrition/block-blue-light-to-sle... https://brighamhealthhub.org/prevention/using-light-emitting-devices-before-bed-may-impact-sleep https://brighamhealthhub.org/prevention/using-light-emitting... https://www.scientificamerican.com/article/q-a-why-is-blue-light-before-bedtime-bad-for-sleep/ https://www.scientificamerican.com/article/q-a-why-is-blue-l...
  - behringer 7y ago
    https://www.ncbi.nlm.nih.gov/pubmed/30311830 https://www.ncbi.nlm.nih.gov/pubmed/30311830 No real conclusions. It's appears to be a study aimed at making future studies better "The review enables further development of an evaluation method of light pollution in LCA regarding the light-induced impacts on human circadian system." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717723/ No definitive conclusions: "Additional laboratory-based and field studies are still necessary to better understand some features of the human circadian response to light. We are only beginning to understand how prior exposure to light affects the subsequent response to a light stimulus, and our understanding of how light exposure can affect the period of the human circadian system is also limited (135)." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/ Seems to be a review of other research by a journalist https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side https://www.health.harvard.edu/staying-healthy/blue-light-ha... news article, not science https://www.sleepfoundation.org/articles/how-blue-light-affects-kids-sleep https://www.sleepfoundation.org/articles/how-blue-light-affe... News article, not science I'd go through the rest but it's time for lunch.
  - 7y ago

goldenkey 7y ago

This is backed by science. Philips Hue uses warmer color temperatures for relaxation presets and colder brighter ones for energization. Anecdotally, the "energize" setting is too much for me. I usually just use Relax, a nice sunny yellow, unless I really need to focus and gear down hard.

TheSpiceIsLife 7y ago
I have a few Philips Choose Scene, or Scene Switch, whatever they’re called this week. They cycle between warm and cool when switched off and back on, but aren’t a connected device. I believe the latest incarnation has a dim and even warmer setting as well.
bildung 7y ago
> This is backed by science. It wasn't at all when I looked into it last year. Can you point me to new research in this area?
- goldenkey 7y ago
  Look at bulb spectra: https://www.researchgate.net/profile/Fawzia_Abdel-Rahman/publication/312320039/figure/fig1/AS:670209421623301@1536801786500/Emission-spectra-of-different-light-sources-a-incandescent-tungsten-light-bulb-b.png https://www.researchgate.net/profile/Fawzia_Abdel-Rahman/pub... Any reptile or bird owner can easily attest to the effectiveness of full spectrum light on a living being.

SaturateDK 7y ago

That's why I'm pretty happy with my smart lights, they can change kelvin rating, so while working it can be blueish, and later on more warm.