I claim the ornamental design for an LED string light candle, as shown and described.
FIG. 1 is a front perspective view of an LED string light.
FIG. 2 is a side view of a left side of the LED string light of FIG. 1.
FIG. 3 is a side view of the right side of the LED string light of FIG. 1.
FIG. 4 is a front view of the LED string light of FIG. 1.
FIG. 5 is a rear view of the LED string light of FIG. 1.
FIG. 6 is a top view of the LED string light of FIG. 1; and,
FIG. 7 is a bottom view of the LED string light of FIG. 1.
The broken lines shown are included for the purpose of illustrating the unclaimed portions of the article and form no part of the claimed design.
The dashed lines above the broken lines is a boundary line that serves to define the bounds of the claimed design and does not form part of the claimed design.