The ornamental design for a light and fanassembly, as shown and described.
FIG. 1 is a front perspective view of a light and fan assembly according to the present invention;
FIG. 2 is a front perspective view of a light and fan assembly according to the present invention that is identical to FIG. 1 but without the broken lines;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
Portions of the light and fan assembly shown in broken lines form no part of the claimed design.