Troffer lamp

FIG. 1 is a front, side perspective view of the new design for a troffer lamp;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image thereof;

FIG. 4 is an end elevational view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a front, side perspective view of a second embodiment of the design for a troffer lamp;

FIG. 7 is a front elevation view thereof;

FIG. 8 is a side elevational view thereof, the opposite side being a mirror image thereof;

FIG. 9 is an end elevational view thereof;

FIG. 10 is a rear elevation view thereof;

FIG. 11 is a front, side perspective view of a third embodiment of the design for a troffer lamp;

FIG. 12 is a front elevation view thereof;

FIG. 13 is a side elevational view thereof, the opposite side being a mirror image thereof;

FIG. 14 is an end elevational view thereof;

FIG. 15 is a rear elevation view thereof;

FIG. 16 is a front, side perspective view of a fourth embodiment of the design for a troffer lamp;

FIG. 17 is a front elevation view thereof;

FIG. 18 is a side elevational view thereof, the opposite side being a mirror image thereof;

FIG. 19 is an end elevational view thereof; and,

FIG. 20 is a rear elevation view thereof.

The broken line disclosure is for environmental purposes only and does not form a part of the claimed design.