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mattbell ([personal profile] mattbell) wrote2010-12-05 09:50 pm
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Sleep experiments with low blue lights... progress report

 I posted earlier about my experimentation with blue-blocking glasses to help improve my sleep.  I ended up not enjoying the experience of wearing the glasses, but I realized that I could achieve similar results by setting up red and orange colored night lights in my house.  This was especially nice to add to my bathroom, as it now allows me to use the bathroom in the middle of the night without forcing myself awake again with bright white lights.  You can get these lights for cheap ($5) at Home Depot.  

While this took care of the ambient room light, it didn't take care of the bright white of my computer screen.  For that I used f.lux, which reduced the blue light coming from the screen. I used f.lux on the strongest setting (Tungsten lighting) and I was surprised by how quickly my brain's white balance adjusted to the new color, especially when the surrounding room lights were red and orange.

This combination of colored room lights and f.lux seemed to work well at helping me get to bed, but not quite as well as wearing the blue-blocking glasses.  

However, based on a couple of weeks of data (which admittedly isn't much), the partial blue blocking setup using the colored lights and f.lux starting 2-3 hours before bedtime did not substantially affect my sleep latency -- it averaged 19min instead of 23min.  What did change substantially was my bedtime.  I found I shifted to going to bed an average of 28 minutes earlier and waking up an average of 5 minutes earlier.  The results actually seemed much bigger until I realized I had seasonal fluctuations in bedtime, so I went back and compared only with data from February, which had a similar day length.  I'm getting more sleep and feeling more well rested, which is good.  

Now I'm going to play with Nocturne, a program that gives me much more full control of screen brightness and appearance than f.lux.  Nocturne lets me set my display's entire color space, invert white to black, and do lots of other tricky things.  So far the best compromise between minimal blue light and maximum readability I've found is to just use the "monochrome" and "tint colors" settings on Nocturne, with the "white" color set to pure red and "black" set to black.    It's not the sort of thing I'd want to use for photo editing, but it works fine for working with text and some web browsing.  I'll report back in a couple of weeks on how that goes.

--

At some point I'm not sure mow much more sleep self-experimentation is worth it.   I do know I still move a lot more than the average sleeper, I'd like to get rid of my remaining mild snoring, and I'd like to improve my recovery time on days when I have to get up extra early, but I don't know how much improvement to my waking life I'll get from further changes.  For now I'll keep gathering data, since the cost to do so from a time perspective is very low.  

It would be nice to declare some sort of victory at some point, but this is one of those infinite games where improvements may continue but the margins will diminish, and true value lies in correctly answering the question of when it's no longer worth the trouble to try to improve further.  

[identity profile] g-w-s.livejournal.com 2010-12-06 07:38 am (UTC)(link)
I just wanted to let you know that I'm enjoying your research quite a bit. I've started using f.lux at home as well. My sleep habits are fairly out of wack.

If you're able, candles produce a very nice yellow light for nocturnal illumination and are quite relaxing as well.

Have you seen this?

http://sleepyti.me/

[identity profile] nasu-dengaku.livejournal.com 2010-12-06 07:50 am (UTC)(link)
Thanks!

Candles are nice to use from time to time and I very much like the visual appeal created by their slight flicker, but they do set things on fire if tipped so they require constant attention. I'm amazed society made do with them as primary illumination up until the early 1900s. :-) The stories about the first electric streetlights and how everyone was blown away by their brightness are fascinating.

As for sleepyti.me, I don't think people's sleep cycles and sleep latencies are accurate enough to make the times it suggests very useful. Most of the sleep tracking devices offer adaptive alarms, which are better at accomplishing the same goal.