A variable multi-source lighting device is provided on both sides of the front part of a motor vehicle to illuminate both sides and/or only one side of the vehicle when driving in a curve. Activation may be determined by the steering wheel or a GPS signal. In use, the device forms a composite light beam composed of partial light beams from individual light sources. Some of the partial light beams are obliquely oriented relative to the vehicle's longitudinal axis and at least one partial light beam is generally parallel to the longitudinal axis. Depending on the vehicle's speed and/or the position of the steering wheel, the sources may be activated individually, in groups, progressively, discretely or continuously so as to increase or decrease the lateral dispersion of light.