FIG. 1 is a top plan view of an ornamental design for a low profile luminaire, showing my new design;

FIG. 2 is a rear elevational view of the invention;

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

FIG. 4 is a front elevational view of the invention;

FIG. 5 is a bottom plan view of the invention; and,

FIG. 6 is a perspective view of the invention.