The ornamental design for a lightbulbhousing, substantially as shown and described.
FIG. 1 is a front isometric view of a first embodiment of a light bulb housing in accordance our new design, wherein the portions illustrated in phantom form no part of the claimed design;
FIG. 2 is a bottom isometric view thereof;
FIG. 3 is a right side elevation view thereof, and a left side elevation view being a mirror image of the right side elevation view;
FIG. 4 is a front side elevation view thereof;
FIG. 5 is a rear side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines are for illustrative purposes and represent environmental structure and unclaimed portions of the invention and therefore form no part of the claimed design.