Patent ID: 8143808

Claim:
A circuit for a motor vehicle, in particular for actuating a lighting device, the circuit comprising: a first light source and a second light source connected in parallel, the first light source being assigned a first current sink and the second light source being assigned a second current sink, the circuit being assigned a measuring device, wherein the measuring device is configured to determine the functionality of the first light source and to determine the functionality of the second light source; and a first switch which is assigned to the first light source and a second switch which is assigned to the second light source, the circuit being assigned a controller in such a manner that the first switch can be switched on the basis of the functionality of the first light source and the second switch can be switched on the basis of the functionality of the second light source; wherein the circuit has a current regulator or a voltage regulator, which is provided for the first light source and the second light source, and the regulator is driven to reduce power loss on the basis of the functionality of the first light source and the second light source.