A luminaire for emergency lighting in tunnels, which comprises: - a casing, elongated in a longitudinal direction and endowed with a longitudinal opening, said longitudinal direction defining in the casing a first end in the casing and a second end opposite to the first end, wherein the casing is an extruded U-shaped aluminum profile comprising a base, in the manner of a core, and two wings that extend from the sides of the base, wherein each of the wings is in turn formed by a plurality of walls (6, 7) disposed consecutively, wherein the walls (6, 7) comprise: a first wall that extends from the base forming an obtuse angle and a second wall that extends from the first wall perpendicular to the base; - lighting means, connectable to the mains, for illuminating the tunnel and which comprise: - a LEDs body having a plurality of primary LEDs, wherein the LEDs body is housed in the interior of the casing and oriented to illuminate the floor of the tunnel; - a cover, mounted on the casing, to cover the opening, therefore closing said casing longitudinally between the first end and the second end; and to protect the LEDs body; and - an autonomous powering device destined for supplying power to the LEDs body in the event of power failure, wherein the powering device comprises: - a battery, connectable to the mains; and - a charger for charging the battery through the mains; wherein from each of the second walls extends a respective flap towards the interior of the casing; characterised in that bushings are disposed at the free end of the flaps, the bushings projecting towards the opening moving away from the base, wherein the bushings are internally threaded so as to screw the LEDs body, and characterised in that the lighting means additionally incorporate a spotlight at each of the first end and the second end of the casing, configured and positioned such as to illuminate the floor obliquely with respect to the longitudinal direction. - a casing, elongated in a longitudinal direction and endowed with a longitudinal opening, said longitudinal direction defining in the casing a first end in the casing and a second end opposite to the first end, wherein the casing is an extruded U-shaped aluminum profile comprising a base, in the manner of a core, and two wings that extend from the sides of the base, wherein each of the wings is in turn formed by a plurality of walls (6, 7) disposed consecutively, wherein the walls (6, 7) comprise: a first wall that extends from the base forming an obtuse angle and a second wall that extends from the first wall perpendicular to the base; - lighting means, connectable to the mains, for illuminating the tunnel and which comprise: - a LEDs body having a plurality of primary LEDs, wherein the LEDs body is housed in the interior of the casing and oriented to illuminate the floor of the tunnel; - a cover, mounted on the casing, to cover the opening, therefore closing said casing longitudinally between the first end and the second end; and to protect the LEDs body; and - an autonomous powering device destined for supplying power to the LEDs body in the event of power failure, wherein the powering device comprises: - a battery, connectable to the mains; and - a charger for charging the battery through the mains; wherein from each of the second walls extends a respective flap towards the interior of the casing; characterised in that bushings are disposed at the free end of the flaps, the bushings projecting towards the opening moving away from the base, wherein the bushings are internally threaded so as to screw the LEDs body, and characterised in that the lighting means additionally incorporate a spotlight at each of the first end and the second end of the casing, configured and positioned such as to illuminate the floor obliquely with respect to the longitudinal direction. - a LEDs body having a plurality of primary LEDs, wherein the LEDs body is housed in the interior of the casing and oriented to illuminate the floor of the tunnel; - a cover, mounted on the casing, to cover the opening, therefore closing said casing longitudinally between the first end and the second end; and to protect the LEDs body; and - an autonomous powering device destined for supplying power to the LEDs body in the event of power failure, wherein the powering device comprises: - a battery, connectable to the mains; and - a charger for charging the battery through the mains; wherein from each of the second walls extends a respective flap towards the interior of the casing; characterised in that bushings are disposed at the free end of the flaps, the bushings projecting towards the opening moving away from the base, wherein the bushings are internally threaded so as to screw the LEDs body, and characterised in that the lighting means additionally incorporate a spotlight at each of the first end and the second end of the casing, configured and positioned such as to illuminate the floor obliquely with respect to the longitudinal direction.