The ornamental design for a magnifierlamp, as shown and described.
FIG. 1 is a perspective view of a magnifier lamp, showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a right side view of the magnifier lamp shown in an alternate position;
FIG. 5 is a left side view of the lamp of FIG. 1;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a perspective view of the magnifier lamp shown with the lid open.
The broken lines shown in the drawings are for the purposes of illustrating unclaimed portions of the magnifier lamp and form no part of the claimed design.