Method for operating an illuminating device, and motor vehicle

A motor vehicle comprising:

• an illuminating device configured to radiate light into a lighting volume, wherein the lighting volume comprises a partial lighting volume and a residual lighting volume;
• and
• a control device configured to:
• evaluate a control condition and to control the illuminating device as a function of a fulfillment of the control condition, the control device further configured to:
• evaluate a fulfillment of a control condition, wherein the control condition is fulfilled when the lighting volume comprises a partial lighting volume that illuminates an area and/or environment volume that is illuminated by an infrastructure luminaire and when the partial lighting volume comprises vertical illumination detected using a shadow of an object in the area and/or volume environment volume;
• and
• when the control condition is fulfilled, control the illuminating device to increase an optical contrast between the object and a background in the area and/or environment volume from a perspective of the motor vehicle such that light is radiated into the partial lighting volume with a higher light intensity than light is radiated into the residual lighting volume of the lighting volume, the residual lighting volume lying outside the partial lighting volume.