Luminaire

FIG. 1 is a top perspective view of the luminaire showing my new and ornamental design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a back elevation view thereof;

FIG. 7 is a side elevation view thereof; and,

FIG. 8 is an alternate side elevation view thereof.

The portions of the luminaire shown in broken lines in the figures attached hereto form no part of the claimed design.