The ornamental design for the rotatable light, as shown and described.
FIG. 1 is a top perspective view of a one embodiment of the rotatable light showing our new design.
FIG. 2 is a front elevational view thereof.
FIG. 3 is a rear elevational view thereof
FIG. 4 is a side elevational view thereof.
FIG. 5 is a top plan view thereof.
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a top perspective exploded view showing the light separated from the base.
The broken lines showing the top of the base are for the purpose of illustrating environmental structure and unclaimed subject matter and form no part of the claimed design.