socket holder 216 by mounting hardware not shown the mounting hardware is screwed on to the socket holder 216 to provide support and to allow the socket holder 216 to rotate with respect to the housing 238 the rotation is limited by a stop pin 236 the stop pin has a first end disposed in slot 248 to allow a predetermined amount of play such that the stop pin is slidable the stop pin has a second end that extends through the light rail portion 246 and into a hole not shown on the housing 238 a light rail 230 is attached to the socket base 216 such that the light rail rotates with the socket base 216 a portion of the light rail 231 is affixed to the socket base 216 and has an elongated hole 246 for the stop pin 236 to pass through and a second hole 252 for the threaded portion of the socket base 216 to pass through the socket holder 216 has a bore 250 through it to allow for passage of electrical wiring to control the lamp not shown the wires would extend from the socket through the bore 250 in the socket base 216 and into the cavity 239 in the center of the housing 236 the wires would extend further outside the housing 236 through hole 254 and exit the housing in the example shown the.