The invention relates to an illuminating device for streets, comprising a number of light sources, a printed circuit board on the upper side of which the light source is arranged, and a cooling body (housing) that is connected to the printed circuit board, on a lower side thereof, that faces away from the light source. The cooling body (housing) has a fixing dome that rises out of an extension plane of the printed circuit board, through a borehole of same. A spring element is fixed to the fixing dome, said spring element pressing onto an upper side of the printed circuit board with a spring arm protruding at an angle from the fixing dome.