You can take a fast ferrie from Hirtsals in Denmark To Kristiansand in Norway, this takes about 2,5 hours.
From Kristiansand to Lysebotn it's about a 3,5 hour drive.
The company operator is www.colorline.com
The name on the fast ferrie is Silvia Ana.
Theres also a new company selling out cheap tickets between Hanstholm in Denmark to Kristiand
www.masterferries.com
Map (in Norwegian) from Kristiand til Lysebotn
http://www.gulesider.no/gsi/map.c?stopId=a_10000037063&startId=a_10000371874&mode=R&search.x=16&search.y=5
I don't know if this is the fastet way from Switzerland to Norway, but it's one of the most common to use
