The ornamental design for a tap with nightlight, as shown and described.
FIG. 1 is a front elevational view of a tap with night light showing my new design;
FIG. 2 is a bottom view thereof;
FIG. 3 is a perspective view thereof;
FIG. 4 is another perspective view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a left elevational view thereof; and,
FIG. 8 is a right elevational view thereof.
The structural features depicted by broken lines have been shown for the purpose of illustrating portions of the tap with night light that form no part of the claimed design.