The ornamental design for a lightbulbadaptor for controlling light intensity and the period to reach determined intensity, as shown and described.
FIG. 1 is a front, top and side perspective view of the light bulb adaptor
for controlling light intensity and the period to reach determined
intensity showing my new design;
FIG. 2 is a side elevational view thereof, all side elevational views being
identical to that shown in FIG. 2;
FIG. 3 is a top plan view thereof; and,
FIG. 4 is a bottom plan view thereof.
The two screw threads shown attach to a light bulb screw thread and to a
light socket screw thread respectively to interpose the device between the
light socket and the light bulb.