Now in Turn Off the Lights v3.1 or higher you have the possibility to shows the Night Mode switch between a chosen time stamp. Example you can makes the switch visible only on 10pm and hide it back on 8am. In the Turn Off the Lights options page can you change manually the time stamp of the Night Mode feature.
In the Turn Off the Lights options page you can change the time between to activate the dark theme on a website. In the options page at the “Advanced Options” you see two date time boxes 24hours system. One is when it going to starts, and the other is when to stop using this feature.