The solitary confinement part is quite harsh, I've never understood how that is supposed to rehabilitate someone.
In France there's early release, parole, etc. so real time he spends behind bars might be as low as two years.
Edit: The WP article is actually a very interesting read, https://en.wikipedia.org/wiki/Libyan_financing_in_the_2007_F...
The court couldn't prove beyond reasonable doubt that the money was used for his campaign.
However they were able to prove beyond reasonable doubt that he knew what his subordinates were planing and that he did nothing to stop it.
In France conspiring to commit a crime is punishable, regardless of whether the crime actually happened or not. That's a law that has been crafted by Sarkozy's own party.
> The solitary confinement part is quite harsh
The solitary part isn't a punishment, but to ensure his safety. They even went as far as to allocated another cell for the two full time police officers of his security detail...
Also the upside is that he has a cell for himself, something a lot of prisoners would love to have given the over prison occupancy in France is 137% (and up to 200% in some specific prisons).