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Re:Back-lit e-readers 'damage sleep and health,' doctors warn by RedSocks112 on Tuesday December 23, 2014 @10:00AM (#8788332)
Paperwhites are not backlit.

"Paperwhite guides light toward the surface of the display with its built-in front light—unlike back-lit tablets that shine in your eyes—so you can read comfortably without eyestrain."

Source: http://www.amazon.com/Kindle-Paperwhite-Ereader/dp/B00AWH595...

Illustration: http://www.nytimes.com/interactive/2012/12/26/technology/lig...

Re:Back-lit e-readers 'damage sleep and health,' doctors warn by k-mcgrady on Tuesday December 23, 2014 @10:20AM (#8788446)
Interesting, thanks for the info. The article specifically calls out 'original Kindles' as being ok which led me to believe the Paperwhite could be an issue - however that might have been referencing the Fire.