No, it happens only with the V1200. No difference if I use the standalone or the mapfiles.
And yes, I mean the street lights and the ai vehicle lights.
For me it seems that the lights turn on at the original vanilla time, but as it`s getting dark earlier with your changes, the game doesn`t recognize that.
Maybe you can change the time when it`s getting dark a little bit. Getting dark around 6 pm in july / august is very early when you are located in western europe.