Light bulb

FIG. 1 is a perspective view of a first embodiment of the lighting bulb;

FIG. 2 is a front view thereof, the rear view being the same as the front view;

FIG. 3 is a side view thereof, the opposite side view being the same as the side view; and,

FIG. 4 is a sectional view thereof, taken along the line 4 - 4 of FIG. 2 .

The broken line showing of the attachment portion is included for the purpose of illustrating only and forms no part of the claimed design.