The ornamental design for a levitating lightbulb and base, as shown and described.
FIG. 1 is a front right perspective view of a levitating light bulb and base showing a first embodiment of my new design;
FIG. 2 is a right view of the levitating light bulb and base of FIG. 1;
FIG. 3 is a left view of the levitating light bulb and base of FIG. 1;
FIG. 4 is a back view of the levitating light bulb and base of FIG. 1;
FIG. 5 is a front view of the levitating light bulb and base of FIG. 1;
FIG. 6 is a top view of the levitating light bulb and base of FIG. 1; and,
FIG. 7 is a bottom view of the levitating light bulb and base of FIG. 1.
Shading is provided to show contour and not surface ornamentation. The broken lines are for illustrative purposes only and form no part of the claimed design.