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Originally Posted by Shades
That's a good question. One would think that it would be the same as reading the unlit kindle under a lamp.
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I would think that it depends on the "temperature" of the light. My ereader lights tend to be bluer than what you get from an incandescent bulb. It may also depend on how the ereader varies the brightness. At least some do it by chopping the light on and off, making the on intervals shorter to make it dimmer. There are definitely differences in the lighting, so it's possible that it has different effects on us.