FIG. 1 is a bottom perspective view of a luminaire showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image;

FIG. 4 is a cross-sectional view thereof taken along the line 4—4 in FIG. 2; and,

FIG. 5 is an enlarged side elevational view thereof.

FIGS. 1-3 and 5 are broken away to indicate indeterminate length. The broken lines are shown in FIGS. 1 and 4 for illustrative purposes only and indicate the nature and use of our new design. The top of the luminaire is unornamented and forms no part of our new design.