The ornamental design for a luminaire, as shown and described.
FIG. 1 is a bottom perspective view of a luminaire showing our new design;
FIG. 2 is a right side elevational view thereof, the left side being a mirror image;
FIG. 3 is an end elevational view thereof shown from one end, the other end being a mirror image;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is an enlarged bottom perspective view thereof, wherein the luminaire is shown broken away to indicate indeterminate length.
FIG. 7 is a side elevational view thereof.
FIG. 8 is an end elevational view thereof;
FIG. 9 is a top plan view thereof; and,
FIG. 10 is a bottom plan view thereof.
The claimed design is comprised of repeating elements arranged along a spine having end caps. The broken lines shown in FIGS. 1-4 and 6-8 represent suspension cables that form no part of the claimed design. The fixture is shown broken away in FIGS. 6-10 to represent a continuation of the design uniformly along a non-specific length.