A lighting device comprising a first light unit having a light source and a first flat light guide having a linear light coupling surface and a light decoupling surface. A second light unit has a light source and a second flat light guide having a linear light coupling surface and a linear light decoupling surface. The first flat light guide and the second flat light guide are connected to each other in a single piece to form a light guide element. Opposite flat sides of the first light guide and opposite flat sides of the second light guide intersect in an intersection area. The first flat light guide has a deflection section between a first flat section and a second flat section of the first flat light guide. The first flat light guide and the second flat light guide form a U-shaped light guide element in a transverse plane.