From a Lufthansa press release...
"Wolfgang Mayrhuber continued: “With the orders for the highly modern B747-8, Lufthansa is setting standards. The Boeing B747-8 is more than just a derivative of the successful Boeing B747 series.“ The airline will be the world’s first carrier to operate services with the new wide-body – the longest passenger jet in the world. In the Lufthansa configuration, the B747-8 will be capable of carrying around 400 passengers. “The B747-8 underlines our strategy of graded market-specific services and capacity expansion. It fits perfectly in our intercontinental fleet structure and slots neatly capacity-wise between the A380 with around 550 seats and the A340-600 with around 300 seats.“
The full press release is available on the Lufthansa website