Tubular lamp

FIG. 1 is a front view of a tubular lamp showing our new design, the portion of the device depicted in broken lines being environment and no part of the claimed design;

FIG. 2 is an enlarged perspective front view of the right end thereof, the portion of the device depicted in broken lines being environment and no part of the claimed design;

FIG. 3 is an enlarged front view thereof, the rear, top, and bottom views being identical thereto, the portion of the device depicted in broken lines being environment and no part of the claimed design;

FIG. 4 is an end view thereof; and,

FIG. 5 is an enlarged rear view of that depicted in FIG. 1 , the front, top and bottom views being identical thereto, the portion of the device depicted in broken lines being environment and no part of the claimed design.