Tubular lamp luminaire with convex and concave reflector sides

A luminaire comprising:

• a hollow reflector (1) having
• a plane of symmetry (2),
• a light emission window (3) extending transversely to the plane of symmetry (2),
• reflector side portions (10) on either side of the plane of symmetry (2);
• and
• means (20), in the plane of symmetry (2), for accommodating a tubular electric lamp (L) along the light emission window (3), which means define a position of an axis (21) of the lamp (L) to be accommodated in the plane of symmetry (2),
• which reflector side portions (10) each include a first, convex area (11) with an outer edge (12) in the light emission window (3), and a second concave area (13) which connects to the first, convex area (11) in a line of inflection points (14), and which has an inner edge (15) close to the axis (21) of the lamp (L) to be accommodated, the line of inflection points (14) being situated at a distance from the light emission window (3), and the reflector side portions (10) forming a lateral screening angle α of at least 25°, characterized in that the distance from the line of inflection points (14) to the light emission window (3) is 0.30 to 0.40 of the distance from the outer edge (12) to the axis (21) of the lamp (L) to be accommodated.