FIG. 1 is a front perspective of a plant cultivation lamp, showing my new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines in the figures illustrate portions of the plant cultivation lamp that form no part of the claimed design.