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 an unspecified length and form no part of the claimed design. The surfaces on either end of the lens shown in broken lines form no part of the claimed design.