The ornamental design for a solid statewallpacklightingfixture, as shown and described.
FIG. 1 is a top perspective view of a solid state wallpack lighting fixture;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a left elevational view thereof; and,
FIG. 7 is a right elevational view thereof.
The broken lines in the drawings are included for the purpose of illustrating elements of the solid state lighting fixture that form no part of the claimed design.