The ornamental design for a projectionlamp, as shown and described.
FIG. 1 is a perspective view of a projection lamp of our design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a part of a cross-sectional view taken along the line 8-8 of FIG. 2 thereof, showing contour lines of the front of the projection lamp.
The broken lines in the drawings are directed to environmental structures and are for illustrative purposes only, and form no part of the claimed design.