The ornamental design for a lightbar for a sanitizing machine, as shown and described.
FIG. 1 is a first front top right perspective view of a light bar for a sanitizing machine showing the new design in combination with an unclaimed sanitizing machine with a lid down;
FIG. 2 is a first front top left perspective view thereof;
FIG. 3 is a second front top left perspective view thereof;
FIG. 4 is a second front top right perspective view thereof;
FIG. 5 is a first front top left perspective view of the light bar for a sanitizing machine of FIG. 1 in combination with an unclaimed sanitizing machine with a lid open;
FIG. 6 is a first front top right perspective view thereof;
FIG. 7 is a top view of the light bar for a sanitizing machine of FIG. 1; and,
FIG. 8 is another view of the light bar for a sanitizing machine of FIG. 5 in combination with an unclaimed sanitizing machine with a lid open.
The broken lines in the figures show portions of the light bar for a sanitizing machine that form no part of the claimed design. Any color, logos, surface ornamentation, and written matter shown in the figures form no part of the claimed designed and is/are hereby disclaimed.