The ornamental design for an ledlamp, as shown and described.
FIG. 1 is rear elevational view of an LED lamp showing my new design.
FIG. 2 is a front elevational view thereof.
FIG. 3 is a front side perspective view thereof; and,
FIG. 4 is a right side elevational view thereof. The left side elevational view, the top plan view, and the bottom plan view are all identical to the right side elevational view.