The ornamental design for the lamp housing, as shown and described.
FIG. 1 is a top plan view of the lamp housing in accordance with my design;
FIG. 2 is a front side elevational view of the lamp housing in accordance
with my design, the view being aligned with one of the lines in the glass;
FIG. 3 is a right side elevational view of the lamp housing in accordance
with my design, the view being aligned between two of the lines in the
glass; and,
FIG. 4 is a bottom plan view of the lamp housing in accordance with my
design.
The broken lines show the environment in which the article is used and are
not considered part of the design claimed.