FIG. 1 is a bottom perspective view of a lens of a recessed lighting fixture showing the new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation view thereof, the rear elevation view being a mirror image thereof;

FIG. 6 is a left elevation view thereof, the right elevation view being a mirror image thereof;

FIG. 7 is a perspective view of a second embodiment of a lens of a recessed lighting fixture, shown separately from the lighting fixture for ease of understanding, and in which the only difference is the aspect ratio;

FIG. 8 is an enlarged front elevation view thereof;

FIG. 9 is a top perspective view of the thereof, shown in a lighting fixture;

FIG. 10 is a bottom perspective view thereof, shown in a lighting fixture;

FIG. 11 is a top perspective view thereof;

FIG. 12 is a top plan view thereof;

FIG. 13 is a bottom plan view thereof;

FIG. 14 is a front elevation view thereof, the rear elevation view being a mirror image thereof;

FIG. 15 is a left elevation view thereof, the right elevation view being a mirror image thereof;

FIG. 16 is a perspective view of a third embodiment of a lens of a recessed lighting fixture shown separately from the lighting fixture for ease of understanding, and in which the only difference is the aspect ratio;

FIG. 17 is a front elevation view thereof;

FIG. 18 is a top perspective view of the lens of a recessed lighting fixture shown in a lighting fixture;

FIG. 19 is a bottom perspective view of a fourth embodiment of the lens of a recessed lighting fixture shown in a lighting fixture, the only difference being the aspect ratio;

FIG. 20 is a top perspective view thereof;

FIG. 21 is a top plan view thereof;

FIG. 22 is a bottom plan view thereof;

FIG. 23 is a front elevation view thereof, the rear elevation view being a mirror image thereof;

FIG. 24 is a left elevation view thereof, the right elevation view being a mirror image thereof;

FIG. 25 is a perspective view of a lens of a recessed lighting fixture shown in the fourth embodiment, and shown removed from the lighting fixture;

FIG. 26 is an enlarged front elevation view thereof; and,

FIG. 27 is a top perspective view thereof, shown in a lighting fixture.

The broken line illustration of the lighting fixture shown in FIGS. 1-27 illustrates environmental structure and forms no part of the claimed design.