We claim the ornamental design for a floor lamp, as shown and described.
FIG. 1 is a perspective view of a floor lamp according to the claimed design;
FIG. 2 is an enlarged detail of the bottom, right-side perspective view of the floor lamp in FIG. 1;
FIG. 3 is a left view of a floor lamp according to the claimed design;
FIG. 4 is a right view of a floor lamp according to the claimed design;
FIG. 5 is a front view of a floor lamp according to the claimed design;
FIG. 6 is a back view of a floor lamp according to the claimed design;
FIG. 7 is a top view of a floor lamp according to the claimed design; and,
FIG. 8 is a bottom view of the claimed design.
The design has been shown broken away to indicate that no particular length is claimed. The portions of the floor lamp shown in broken lines form no part of the claimed design.