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.

A suspension arm assembly includes at least three horizontally aligned members relatively rotatable about each other, each adjacent pair of the at least three horizontally aligned members being connected to each other by a joint; a conduit pathway for positioning at least one conduit such that the at least one conduit extends along the at least three horizontally aligned members, outward of a load bearing periphery of the at least three horizontally aligned members; a brake system comprising a brake at each joint for selectively preventing movement of respective adjacent ones of the at least three horizontally aligned members about the joint; and at least one shell arranged about the at least three horizontally aligned members and the conduit pathway.