We claim the ornamental design for a light source of light emitting diode, as shown and described.
FIG. 1 is a front perspective view of a first embodiment of a light source of light emitting diode of the present invention;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a first side view thereof;
FIG. 5 is a second side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a front perspective view of a second embodiment of a light source of light emitting diode of the present invention;
FIG. 9 is a front view thereof;
FIG. 10 is a rear view thereof;
FIG. 11 is a first side view thereof;
FIG. 12 is a second side view thereof;
FIG. 13 is a top view thereof; and,
FIG. 14 is a bottom view thereof.
The broken line showing of light source of light emitting diode is included for the purpose of illustrating environment and forms no part of the claimed design.