PURPOSE: To reduce illuminance irregularity in an irradiated surface without deteriorating illuminance, light output ratio, or temperature conditions by disposing a light distribution control member at a front surface position of a lamp at a position corresponding to a part where the illuminance irregularity is generated.

CONSTITUTION: A luminaire has a luminaire main body 1 and a light distribution control member 2. The member 2 is provided at a front surface position of a lamp 3 corresponding to the position of illuminance irregularity by partial high illuminance in an irradiated surface to reduce the illuminance irregularity. For example, a transparent glass panel 2a of a specified form is used to be installed on an inner flange 11 formed at an aperture 8. The illuminance irregularity of the partial high illuminance by direct light from the lamp 3 exists in a zone A close to the irradiated surface by the lamp 3 in front of the lamp 3, the member 2 is formed by applying diffusion and translucency treatment by a printing or hydrofluoric acid process in a semi-circular form, and as the direct light from the lamp 3 enters the member 2, transmitted light is diffused, thereby the illuminance irregularity in the irradiated surface is eliminated.