light device embodying a plurality of light functions of a motor vehicle with the aid of light sources groups dedicated function by

The invention provides a lighting device for a motor vehicle comprising the power control means of a plurality of light sources, the plurality of sources being divided into at least two groups of sources. The device according to the invention is noteworthy in that each of the light source groups fulfills a specific light function of the device and is characterized by an electric current requires a specific intensity. In addition, the control means are suitable for selectively supplying each of the light source groups exclusively of other groups. A feeding method implementing the device according to the invention is also provided.