The ornamental design for an “LED base,” as shown and described.
FIG. 1 is a perspective view of an “LED base” showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a perspective view showing the first practical usage;
FIG. 9 is a perspective view showing the second practical usage; and,
FIG. 10 is a perspective view showing the third practical usage thereof.
The broken lines throughout the drawings are included for the purpose of illustrating portions of the subject matter that form no part of the claimed design.