The ornamental design for a barbecuegrilllight, as shown and described.
FIG. 1 is a top perspective view of a barbecue grill light showing our new design;
FIG. 2 is another top perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is rear elevational view;
FIG. 7 is a is a right side elevational view thereof; and,
FIG. 8 is a is a left side elevational view thereof.
The broken lines showing knobs, internal clamping structure and other details of the barbecue grill light are for the purpose illustrating environmental structure and form no part of the claimed design. The long-short-long broken lines in FIGS. 1, 2, 4, and 5 represent the bounds of the claimed design and form no part thereof.