Virgin Atlantic uses a mixed fleet of Airbus and Boeing aircraft. Heathrow and Gatwick based flights are operated by Airbus A320 series aircraft. Emirates is also the largest operator of the Airbus A380 aircraft. Wizz Air began operations with a fleet of Airbus A320 jets. Cabin lighting on recent Airbus and Boeing jetliners uses LED lighting. Lightning II and in Airbus A380 backup flight controls. This class is offered only on flights operated by Boeing 787-9 Dreamliner or Airbus 350-900. It is the world's busiest airport for Airbus A320 aircraft. Arlanda can handle all aircraft types in service including the Airbus A380. Premium Business Class is available on the Boeing 777-300ERs and Airbus A350-900. The passenger doors are smaller than on its Boeing and Airbus counterparts. There are wingtip devices on the Airbus A380. Gates C4 and C9 are capable of handling an Airbus A380. There are also Boeing and Airbus standards. It currently has 2 gates, both capable of handling Airbus A380 aircraft.