FIG. 1 is a perspective view taken from the front and bottom of an ornament for light tube showing a first embodiment of the design;
FIG. 2 is a perspective view taken from the front and top of the ornament for light tube of FIG. 1;
FIG. 3 is a front elevation view of the ornament for light tube of FIG. 1, the rear, right and left side elevation views being identical;
FIG. 4 is a bottom plan view of the ornament for light tube of FIG. 1;
FIG. 5 is a perspective view taken from the front and bottom of an ornament for light tube showing a second embodiment of the design;
FIG. 6 is a perspective view taken from the front and top of the ornament for light tube of FIG. 5;
FIG. 7 is a front elevation of the ornament for light tube of FIG. 5, the rear, right and left side elevation views being identical;
FIG. 8 is a bottom plan view of the ornament for light tube of FIG. 5;
FIG. 9 is a perspective view taken from the front and bottom of an ornament for light tube showing a third embodiment of the design;
FIG. 10 is a perspective view taken from the front and top of the ornament for light tube of FIG. 9;
FIG. 11 is a front elevation of the ornament for light tube of FIG. 9, the rear, right and left side elevation views being identical; and,
FIG. 12 is a bottom plan view of the ornament for light tube of FIG. 9.
The broken lines shown in the drawings are included for the purpose of illustrating environment and form no part of the claimed design.