Since I don't speak german but understand it on the forum, I have a nice tip: the "dachluke" doesn't have a rollo. and every morning i woke from the light. I contacted the supplier and searched the net. I found the same "dachluke" with a rollo, an update of the one that is build-in in the t@b. I got it yesterday:
Rollo dachluke
Wir wünschen euch allen schöne Feiertage und ein frohes Weihnachtsfest!