An elongated lighting device (1) having a first and a second suspension point (8, 8') for suspending the lighting device (1), comprising: a plastic housing (2) extending from the first suspension point (8) to the second suspension point (8'); a light source carrier (4) having one or more solid state light sources (6) mounted on a surface thereof, the carrier (4) being arranged along the housing (2) so that the one or more light sources (6) emit light into the housing (2). A wire (10) is arranged inside the housing (2) between the first and second suspension points (8, 8') so as to prevent the lighting device (1) from bending.