Use APKPure App
Get Dimmer ( Night Mode ) old version APK for Android
Dim your screen down to the minimum allowed brightness with one touch.
Dim your screen to the minimum allowed brightness with one touch - this is dimmer than 'Display Settings' allows you to go. Great for night time use.
Android 1.6+
Donations welcome by purchasing 'Cleaner Pro'
Thx to DipeshB for the idea.
Touch again to restore brightness.