FIG. 1 is a bottom plan view of a circular lighting louver showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation view thereof, remaining sides being substantially identical thereto;

FIG. 4 is an enlarged sectional view taken on line 4—4 in FIG. 2;

FIG. 5 is a perspective top view thereof; and,

FIG. 6 is a perspective bottom view thereof.