Set at which time night/ day begins?

An option that let's us set the time when day or night starts for the plugin would be nice.
For example I find 8pm very late for the night time to start especially if one sets it to short
cause from 7 to 8pm it already gets very dark.

I don't wanna let the players vote.
I wanna speed up the night time as I can with Time Of Day.
Problem is that the day is 2 hours long and that means that the time from 7pm to 8pm where it's already very dark takes very long.
That's why I would like to let the night time start an hour earlier to make sure the time where players can't see much is shorter.