The ornamental design for a lightingfixturecomponent, as shown and described.
FIG. 1 is a front side perspective view of a lighting fixture component in accordance with the present invention;
FIG. 2 is a right side view thereof;
FIG. 3 is a rear side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a front side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The lighting fixture component is not limited to the scale shown herein. The broken lines of the Figures are for illustrative purposes only and form no part of the claimed design.