December 22, 2014
eBook Readers Suppress Melatonin And Reduce Sleep

A study finds that eBook readers put out light frequencies that lower melatonin and reduce the amount we sleep.

Not new news. See Artificial Light Cutting Melatonin-Driven Sleep. I bought these sunglasses to cut down on blue light but forgot to use them for evening reading. This report is a reminder. Also see some earlier posts: Artificial Light Suppresses Melatonin, Boosts Cancer, Poor Teen Sleeping Due To Lack Of Blue Light?, and Television Watching Lowers Melatonin, Hastens Puberty.

The Kindle Paperwhite comes with unadjustable color. But in theory a tablet's color should be adjustable to turn off blue. The problem I find on my Nexus 10 tablet is that both the Kindle Reader app and the Google Play Book app provide only a few background color choices. There's no "turn off the blue" choice. Though I've changed them both to a more brownish-red background I'd really like a way to toggle between white background for day reading and "no blue" background for night reading.

Share |      Randall Parker, 2014 December 22 08:37 PM 

Joseph Moroco said at December 23, 2014 2:48 PM:

I have used orange glasses when using a kindle before bed. I think it helps.

Mike Johnson said at December 24, 2014 12:07 PM:

I use an piece of orange plastic that fits snugly over my Kindle's screen. It was cut to size from a larger piece- got it from somewhere on Amazon.
Easy enough to use it at night, and take it off during the day.

Wolf-Dog said at December 24, 2014 12:47 PM:

How about using laptops to read electronic books? It seems to me that my old Dell Latitude D600 from the year 2003 has a very mild screen with a light that looks like the old incandescent lights, and reading from this old screen is relaxing. But newer laptops seem to have sharper colors, although it might be possible to suppress the blue light by adjusting the colors.

Also, are programmers who spend 10-12 hours per day in front of regular LCD computer screens at risk too?

Wolf-Dog said at December 24, 2014 1:24 PM:

By the way, eZ PDF reader for Android only, and has a night mode where the background becomes black and the text becomes white. The background color and text color can also be adjusted.

Dr. Franklyn said at February 16, 2015 7:35 AM:

Well I am using Kindle for such a long time. Nearly more than 4 hours a day. I don't see any problem with it. However nice article.

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