We claim, the ornamental design for a luminaire structure, as shown and described.
FIG. 1 is a bottom, right side perspective view of a luminaire structure, showing our new design;
FIG. 2 is a perspective view as viewed from below on the left side thereof;
FIG. 3 is a perspective view as viewed from above on the right side thereof;
FIG. 4 is a perspective view as viewed from above on the left side thereof;
FIG. 5 is a front elevational view thereof, where the rear elevational view is a mirror of this view and, therefore, has been omitted;
FIG. 6 is a side elevational view thereof, where the opposite side elevational view is a mirror of this view and, therefore, has been omitted;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines in the drawings illustrate portions of the luminaire structure which form no part of the claimed design.
The luminaire structure is shown with symbolic break lines FIGS. 1-8, with symbolic break lines along its length, width and/or depth. The appearance of a portion of the article between the break lines does not form part of the design.