The ornamental design for a luminaire, as shown and described.
FIG. 1 is a front top perspective view of a luminaire showing our new design;
FIG. 2 is a rear top 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;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken boundary lines shown in the rear of the luminaire in FIGS. 2, 5, 6, and 7 indicate the boundary of the design. The area within the boundary lines forms no part of the claimed design.
The broken line block shown in FIGS. 1 and 3-7 represents a mounting block for mounting the luminaire to a wall. The mounting block forms no part of the claimed design.