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> Or perhaps with paper, where we get to choose what light to use for our nighttime reading, and it is often done with a light dedicated specifically to that task, we tend to choose low blue lights?

An e-ink screen with light turned off should be similar to paper (a little less contrast than a book, perhaps, but higher than a "grey" newspaper).

And while we have a lot of terrible modern light sources, a regular glow lamp would be much warmer than a typical "white" led.




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