Thought id share this...
I found my skysafari (night mode) on my tablet way too bright even on the lowest brightness setting.
So i had a look and found this free app for called Screen Filter. It lets you choose a lower brightness way beyond Androids built-in setting. It works best on AMOLED screens as it gives extra battery life.
https://play.google.com/store/apps/d...om.haxor&hl=en