not shown those of skill in the art will recognize that the present invention may be used with any acceptable means of attaching socket 14 to the reflector of a light assembly including but not limited to the use of threads or clips or forming the socket integrally with the reflector these and other variations are within the scope of the present invention referring now to fig3 a perspective view of an alternative embodiment of a pivot stud according to the present invention is shown pivot stud 32 comprises tubular ball 34 and post 36 tubular ball 34 is rounded about axis b tubular socket portion 38 comprises chamber 40 and a plurality of tabs 42 tabs 42 and chamber 40 are fashioned so as to mate with tubular ball 34 when mated tubular ball 34 is held snugly within chamber 40 by tabs 42 in this embodiment a uniformly rounded surface is realized by the round shape of tubular ball 34 about axis b thus even when tubular ball 34 is mated with socket 38 socket 38 is able to be rotated about tubular ball 34 about axis b however because the joint realized by mating tubular ball 34 with socket 38 is not uniformly rounded about any other axis movement about any other axis is not allowed accordingly by use of a single pivot stud a joint is realized which only allows rotation about a single axis referring now to fig4 a perspective view of a further alternative embodiment of a pivot stud according to the present invention is shown pivot stud 44 comprises tubular ball 46 and post 48 tubular ball 46 is rounded about axis c tubular ball 46 comprises slot 50 which is used in this.