The ornamental design for a light switchhousing, substantially as shown and described.
FIG. 1 is a perspective view of the light switch housing showing my design;
FIG. 2 is a left side end view thereof with reference to FIG. 1;
FIG. 3 is a perspective view of the light switch housing shown in FIG. 1
rotated 90° and inverted to show the bottom and right side thereof;
and
FIG. 4 is a perspective view of the light switch housing shown in FIG. 1
shown in position of use with the lamp socket and lamp bulb shown in
phantom for illustrative purposes only.