The ornamental design for a luminaire with dimmer part, as shown and described.
FIG. 1 is a front perspective view of a luminaire with dimmer part, showing our design;
FIG. 2 is an enlarged view of circle A in FIG. 1;
FIG. 3 is a rear view of the luminaire with dimmer part;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a front perspective view thereof; and,
FIG. 9 is an enlarged view of circle B in FIG. 8.
The dash-dash-dash broken lines represent portions of the luminaire with dimmer part and form no part of the claimed design. The dash-dot-dash broken lines show areas of enlargement and form no part of the claimed design.