The ornamental design for a luminaire, as shown and described.
FIG. 1 is a front perspective view of a luminaire, showing our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a right side elevational view thereof, the left side being a mirror image;
FIG. 5 is a rear elevational view thereof; and,
FIG. 6 is a top plan view thereof, the bottom plan view being a mirror image.
The inner rectangular area at the front of the luminaire shown in FIGS. 1 and 3 represents a light emitting surface of an area light source, such as an OLED panel.
The inner broken line rectangles shown in FIGS. 2 and 5 represent a light emitting surface of an area light source, such as an OLED panel, and a mounting ring plate therefor. The structures shown in broken lines form no part of the claimed design.