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 left, right, and rear sides being identical thereto;
FIG. 3 is an elevational view of front-right side of the lamp housing in
accordance with my design, the front-left, rear-right, and rear left being
substaintally identical thereto; 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.