The ornamental design for a ledlightbar, as shown and described.
FIG. 1 is a perspective view of a LED light bar, showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a rear elevation view thereof;
FIG. 6 is a left elevation view thereof; and,
FIG. 7 is a right elevation view thereof.
The evenly-sized dash-dash broken lines shown in the drawings depict portions of the LED light bar that form no part of the claimed design, while the unevenly-sized dash-dot-dash broken lines represent the bounds of the claimed invention but form no part thereof.