The ornamental design for a lens for an ledluminaire, as shown and described.
FIG. 1 is an isometric view of the lens;
FIG. 2 is an end view of the lens of FIG. 1 from a right side;
FIG. 3 is an end view of the lens of FIG. 1 from a left side; and,
FIG. 4 is a side elevation view of the lens of FIG. 1.
The wavy broken lines in the drawings indicate that the design has no particular length and form no part of the claimed design. The broken lines showing unclaimed portions of the lens and the surfaces on either end of the lens form no part of the claimed design.