Lighting device, preferably of the type to be installed on a piece of furniture, on a furnishing complement or the like, on a roofing installation or on a structure or installation in which lighting is provided and/or required, comprising a section bar, to be applied to a structure and/or installation in which lighting is provided and/or required, and a LED strip, said section bar being made of extruded polymeric material and being configured so as to define a hollow seat therein longitudinally extending to house removably said LED strip, wherein said section bar: - always presents, along at least a part of its longitudinal extension, at least one through opening, also longitudinally extending, in order to always put said hollow seat, which is defined inside the section bar itself, in communication with the outside - is configured so that the insertion of said LED strip inside the hollow seat occurs through said through opening and in a direction which is angled, and which is preferably substantially orthogonal, with respect to the longitudinal development direction of the profile itself, - comprises at least a portion which is configured to allow, at least in part, the transmission towards the external environment of the light generated by said LED strip which is intended to be housed within said hollow seat, - has, at the longitudinal opening, a single portion which is elastically deformable so as to allow its movement by its rotation around a longitudinal portion of said section which acts as an articulation axis, following the application of an external force on said portion, so that said section bar passes from a first configuration, corresponding to the condition of use and installation of the section bar itself, in which the hollow seat is in communication with the outside through said longitudinal through opening, to a second deformed opened configuration in which the hollow seat is in communication with the outside through a passage of such amplitude as to allow the insertion of the LED strip within said hollow seat, characterized in that:- in the absence of external stresses, the width of the longitudinal opening 50 is smaller than both dimensions of the cross section of the LED strip 40, - the hollow seat has, at least in part, a profile complementary to that of the LED strip to be housed therein, and is shaped so that, once the LED strip is inserted, it remains stably in position in said seat, said LED strip being inserted in said hollow seat passing through said longitudinal opening of said section bar and according to a direction which is angled, and which is preferably substantially orthogonal, with respect to the direction of longitudinal development of said section. - always presents, along at least a part of its longitudinal extension, at least one through opening, also longitudinally extending, in order to always put said hollow seat, which is defined inside the section bar itself, in communication with the outside - is configured so that the insertion of said LED strip inside the hollow seat occurs through said through opening and in a direction which is angled, and which is preferably substantially orthogonal, with respect to the longitudinal development direction of the profile itself, - comprises at least a portion which is configured to allow, at least in part, the transmission towards the external environment of the light generated by said LED strip which is intended to be housed within said hollow seat, - has, at the longitudinal opening, a single portion which is elastically deformable so as to allow its movement by its rotation around a longitudinal portion of said section which acts as an articulation axis, following the application of an external force on said portion, so that said section bar passes from a first configuration, corresponding to the condition of use and installation of the section bar itself, in which the hollow seat is in communication with the outside through said longitudinal through opening, to a second deformed opened configuration in which the hollow seat is in communication with the outside through a passage of such amplitude as to allow the insertion of the LED strip within said hollow seat, characterized in that:- in the absence of external stresses, the width of the longitudinal opening 50 is smaller than both dimensions of the cross section of the LED strip 40, - the hollow seat has, at least in part, a profile complementary to that of the LED strip to be housed therein, and is shaped so that, once the LED strip is inserted, it remains stably in position in said seat,