FIG. 1 is a right side elevational view of a decorative light string showing my new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a top front perspective view thereof;
FIG. 4 is a right side elevational view thereof in an alternate position and without wires for ease of illustration;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan thereof;
FIG. 8 is a front elevational view thereof; and,
FIG. 9 is a rear elevational view thereof.
The broken lines in FIGS. 1 and 2 show portions that form no part of the claimed design.