Recessed downlight luminaire

FIG. 1 is a perspective view of a first embodiment of the ornamental design for a recessed downlight luminaire;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and

FIG. 7 is a bottom view thereof.

FIG. 8 is a front view of a second embodiment of the ornamental design for a recessed downlight luminaire;

FIG. 9 is a back view thereof;

FIG. 10 is a right side view thereof;

FIG. 11 is a left side view thereof;

FIG. 12 is a top view thereof;

FIG. 13 is a bottom view thereof; and

FIG. 14 is a perspective view thereof.

FIG. 15 is a front view of a third embodiment of the ornamental design for a recessed downlight luminaire;

FIG. 16 is a back view thereof;

FIG. 17 is a right side view thereof;

FIG. 18 is a left side view thereof;

FIG. 19 is a top view thereof;

FIG. 20 is a bottom view thereof; and

FIG. 21 is a perspective view thereof.

FIG. 22 is a perspective view of a fourth embodiment of the ornamental design for a recessed downlight luminaire;

FIG. 23 is a front view thereof;

FIG. 24 is a back view thereof;

FIG. 25 is a right side view thereof;

FIG. 26 is a left side view thereof; and

FIG. 27 is a top view thereof.

FIG. 28 is a front view of a fifth embodiment of the ornamental design for a recessed downlight luminaire;

FIG. 29 is a back view thereof;

FIG. 30 is a right side view thereof;

FIG. 31 is a left side view thereof;

FIG. 32 is a top view thereof;

FIG. 33 is a bottom view thereof; and

FIG. 34 is a perspective view thereof.

FIG. 35 is a front view of a sixth embodiment of the ornamental design for a recessed downlight luminaire;

FIG. 36 is a back view thereof;

FIG. 37 is a right side view thereof;

FIG. 38 is a left side view thereof;

FIG. 39 is a top view thereof; and,

FIG. 40 is a perspective view thereof.

The broken-line disclosure in the views is understood to represent portions of the article in which the claimed design is embodied, but which form no part of the claimed design.