[rkw]

This is just a thought experiment sort of idea. But a 'night mode' might be result better performing readers? Better performing him that there would be less white that needs to be eliminated and the lighting that's there might be perceived, or actually, to be more even lit?

FYI, by night mode I refer to a screen with white text on a black background.

Anyway that's just something different different that came to my mind. It's certainly nothing I've come across on an e-reader before. I can see where it probably would not have been relevant in a unlighted reader but in a front–lighted reader, who knows, some people might find it easier on the eyes.