The ornamental design for a motionsensorlampadaptor, as shown and described.
FIG. 1 is a front view of a motion sensor lamp adaptor showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a rear elevational view thereof; and,
FIG. 6 is a bottom plan view thereof.
The broken-line disclosure of elements in the views are understood to be functional aspects of the article in which the design is embodied and form no part of the claimed design.