FIG. 1 is a perspective view of a parts of LED lamps showing my new design; FIG. 2 is a front view thereof; FIG. 3 is a rear view thereof; FIG. 4 is a left side view thereof; FIG. 5 is a right side view thereof; FIG. 6 is a top view thereof, FIG. 7 is a bottom view thereof; and, FIG. 8 is a perspective view viewed from another visual angle. The broken lines depict portions of the parts of LED lamps which form no part of the claimed design.