Luminaire

FIG. 1 is a perspective view of a new ornamental design for a luminaire;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a right-side elevation view thereof; and,

FIG. 7 is a left-side elevation view thereof.

In the drawings, the dash-dot-dash broken lines indicate the boundaries of the claimed invention while the broken lines shown represent unclaimed subject matter and form no part of the claimed design.