The ornamental design for a multi-functional straight folding LED work light, as shown and described.
FIG. 1 is a perspective view of the multi-functional straight folding LED work light showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a rear elevation view thereof
FIG. 4 is a top plan view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a right side elevation view thereof; and,
FIG. 7 is a front elevation view thereof.
Throughout the drawings the broken lines depict portions of the multi-functional straight folding LED work light that form no part of the claimed design.