We claim the ornamental design for a lens for a light emitting diode, as shown and described.
FIG. 1 is an upper perspective view of a first embodiment of a lens for a light emitting diode, showing our new design;
FIG. 2 is a lower perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a left side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is a cross-sectional view thereof, (taken along axis 9-9).
The broken lines are for illustrating unclaimed portions of the lens for a light emitting diode and for illustrating an environment related to the claimed design; the broken lines form no part of the claimed design; the cross-sectional view of FIG. 9 is included to illustrate surface shape; interior structure forms no part of the claimed design.