If we can turn that off completely I'm fine with that. More important to me would be a higher Eink screen resolution.
You can use the
Sony Reader Cover with Light if you need some light once in a while. It illuminate the screen of your Sony Reader with a protective cover that integrates a light for reading in the dark. I use it while reading on the balkony in the evening, for example. The battery lasts 20 hours, you could have read the entire time while your power went off, laughingdragons.