[notimp]

Short added point on the orange light. I don't buy the "blue light makes you sleep worse" mambo jambo - that electronics are sold with nowadays - not in the least.

Calibrate your monitors to D65 whitepoint (which already is a "warm" white, compared to the usual "colder sells better" factory settings), sleep much better, with the the notion, that you actually get a color accurate image.

The science behind this apparently is real - but they tested with roomlight as a reference, not with yo smartphone screen. So buy warmer nightlights and stop selling people LCD color filters as "godo for their health".

I digress.

The orangy frontlight is good for another reason though. Immersion. Turns out, that to reach a state of less "activation" is beneficial for long reading. Turns out that "candle light" (TM - reached with orange LEDs) actually is beneficial to get you into that state. We've "amateurishly" tested that stuff with LCD based tablets about 4 years ago - in an incidence of "parallel invention", people started suggesting, to read on LCD tablets black on orange - and, it worked. Better flow state (reading speed, information retention) - still not ideal.

The same holds true with orange front light on these new bunch of ereaders. Better reading experience, still not ideal. (And I still think that some of the "not ideal" part is actually introduced by the direct light source, maybe flicker, maybe difference to room light - I dont know - but to give the frontlight more of an orange tint, imho is quite an improvement - in the "how it feels" department. (Activation level, flow state - however you want to call, or attempt to measure that.)).

Its not "day and night" coming from a Paperwhite, but it helps. Its a good evolutionary step.