The ornamental design for a luminaire, as shown and described.
FIG. 1 is a perspective view of the luminaire showing the design;
FIG. 2 is a perspective view of one of the reflecting elements of the luminaire showing only a portion of the new design. The claimed embodiment has sixteen such reflecting elements, arranged in four clusters;
FIG. 3 is a bottom view of FIG. 2.
FIG. 4 is a perspective view of one of the clusters of reflecting elements that make up the claimed design;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a side view of FIG. 4, and,
FIG. 7 is a bottom view of FIG. 4.
Portions of the claimed design have been omitted from FIGS. 2–7 for illustrative purposes only.