FIG. 1 is a front, left, top, perspective view of a cove luminaire, showing my new design;

FIG. 2 is a right side elevational view thereof, the left side being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The subject matter shown in broken line represents an unclaimed fluorescent lamp which is shown for illustrative purposes and forms no part of the claimed design.