FIG. 1 is a perspective view of an LED light bulb showing our new design. FIG. 2 is a front elevational view thereof. FIG. 3 is a rear elevational view thereof. FIG. 4 is a left-side, elevational view thereof. FIG. 5 is a right-side, elevational view thereof. FIG. 6 is a top plan view thereof. FIG. 7 is a bottom plan view thereof; and, FIG. 8 is an enlarged cross-sectional view thereof taken along the line VIII—VIII in FIG. 2.