FIG. 1 is a front, left side, and top perspective view of a light diffuser showing the new design;
FIG. 2 is a rear, left side, and bottom perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a left side elevation view;
FIG. 6 is an enlarged front elevation view thereof;
FIG. 7 is an enlarged rear elevation view thereof; and,
FIG. 8 is a right side elevation view thereof.
The broken lines shown in the drawings illustrate portions of the light diffuser that form no part of the claimed design.