The invention relates to a lighting device (1; 1; 1; 101; 101) with a lamp housing (2; 2; 2; 102; 102) and a lighting unit (3; 3; 3; 103; 103). The lamp housing has a light emission area (7; 7; 7; 107; 107) on a light output side (5; 5; 5; 105; 105) thereof and on a side (11; 11) facing away from the light output side (11; 11; 11; 111; 111) thereof has a curved, dome-shaped rear wall (13; 13; 13; 113; 113). The lighting unit is set up to emit light on the light output side (17; 17; 17; 117; 117) thereof in order to emit the light through the light emission area of the lamp housing. The lighting unit has at least one device (23; 23; 23) on a rear side (19; 19; 19; 119; 119) facing away from the light output side (17; 17; 17; 117; 117); 123; 123) which can be used to attach the lighting unit in a selectable location on the rear wall (13; 13; 13; 113; 113) of the lamp housing using a magnetic force, thereby enabling adjustment of the beam direction (A) of the lighting unit in relation to the lamp housing.