The ornamental design for a luminaire, as shown and described.
FIG. 1 is a front perspective view of a luminaire
FIG. 2 is a top view thereof
FIG. 3 is a bottom view thereof
FIG. 4 is a left-side view thereof
FIG. 5 is a right-side view thereof
FIG. 6 is a rear view thereof; and,
FIG. 7 is a front view thereof.
The broken lines shown are included for the purpose of illustrating environmental structure and form no part of the claimed design.
The break lines in the drawings indicate that the appearance of any portion of the luminaire between the break lines forms no part of the claimed design.