We claim the ornamental design for a recessed light fixture cover, as shown and described.
FIG. 1 is a view of a recessed light fixture cover showing my new design;
FIG. 2 is a top view of the recessed light fixture cover thereof;
FIG. 3 is a right side view of the recessed light fixture cover thereof;
FIG. 4 is a bottom view of the recessed light fixture cover thereof;
FIG. 5 is a left side view of the recessed light fixture cover thereof;
FIG. 6 is a front view of the recessed light fixture cover thereof;
FIG. 7 is a back view of the recessed light fixture cover thereof; and,
FIG. 8 is a view of the recessed light fixture cover suspended from a ceiling.
The broken lines shown in FIGS. 1-7 represent portions of the cover which form no part of the claimed design, and in FIG. 8 the claimed design is shown in use with multiple lights installed in a ceiling which represent environment forming no part of the claimed design.