Don't know about battery life. I guess if it's AMOLED, https://www.greenbot.com/article/2834583/how-much-power-does...
In fact, I wish the Kindle Paperwhite would come out with an inverted mode already (although I think I read there were some challenges with doing so). It can be fairly straining on my eyes to have the sidelit screen bright enough to be legible while being as dim as possible to make reading with the lights off comfortable.
In the UX StackExchange post, it's stated that astigmatism is also a contributing factor to favor dark text on white background. I do believe that these night time settings should be toggled automatically for white text with dark background as well as accounting for blue wavelength reduction for screens with full colors.
I find having a significant portion of the screen white when my eyes are relatively dark-adapted uncomfortable, even when the brightness is set fairly low. I find a dark background with light text very preferable under those conditions. I do not care if there is research suggesting I should not have this preference.
From talking to others in person and online, I get the impression that my preference is very common. Android was supposed to get something resembling this, but the feature has been dropped or delayed.
Well, certainly not for my eyes.
>Don't know about battery life. I guess if it's AMOLED
Yes, that's what I meant, as discussed in the thread below. I didn't realise of common LCD screens still are. I haven't had one since 2012...
