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Perhaps it depends on the level of sensitivity we each have. I've read in bed all my life with no problems. I start getting sleepy within half an hour.
A few years ago, when i first got an iPad, i read in bed with it, and after a few weeks realized i was wide awake, and reading for hours, so i stopped and went back to my (unlit) kindle. My normal pattern resumed. So now I use my kindle PW2 downstaris, and unlit kindle touch in bed. It works very well.
I've just returned from a trip overseas, and only took an ipad. Bang, same problem. So, i'm convinced that I'm sensitive to the blue light, and respond very differently to an ipad vs a kindle touch.
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