@Stjepan-Pavlek Oh, I hadn't even thought of the timings. Think about this, you're (so far) the only one on this forum who is giving information about Night Shift. I still have an iPad 2. The screen has a shallow crack in it, but otherwise works O.K. I don't have the money to "update". I would also like to use Night Shift.
Anyway, how long would you say it takes for the feature to transition on the iPad, and you also say it's lighter. What settings are you using on the mac, and about where does that color match when the iPad is done transitioning?