The ornamental design for a combinationlight and base, as shown and described.
FIG. 1 is a perspective view of a combination light and base showing my new design;
FIG. 2 is a front elevational view thereof; and,
FIG. 3 is a top plan view thereof.
The broken-line disclosure in the views illustrate either portions of the article which form no part of the claimed design or an unclaimed boundary between claimed and unclaimed portions.