FIG. 1 is a perspective view of the design for a luminaire.

FIG. 2 is a front view of the design.

FIG. 3 is a back view of the design.

FIG. 4 is a left side view of the design. The right side view of the design is a mirror image of the left side view, and, therefore, has been omitted.

FIG. 5 is a top view of the design. The bottom view of the design is a mirror image of the top view, and, therefore, has been omitted; and,

FIG. 6 is a front view of a second embodiment of the design for a luminaire, wherein the length of the luminaire is indeterminate. With the exception of length, is it understood that all of the views are identical to the views of the first embodiment.

The broken line showing of environmental structure is for illustrative purposes only and forms no part of the claimed design.