The ornamental design for a suspensionlamp, as shown and described.
FIG. 1 is a perspective view of my new suspension lamp;
FIG. 2 is a front elevational view of my new suspension lamp;
FIG. 3 is a rear elevational view of my new suspension lamp, opposite that of FIG. 2;
FIG. 4 is a side elevational view of my new suspension lamp;
FIG. 5 is another side elevational view of my new suspension lamp from a side opposite that of FIG. 4;
FIG. 6 is a top view of my new suspension lamp; and,
FIG. 7 is a bottom view of my new suspension lamp.
The broken line showing of portions of the suspension lamp in the figures is included for the purpose of illustrating environmental structure and forms no part of the claimed design.