This standard describes methods of light level control between an external locking type photocontrol (or similar device) and a dimmable ballast or driver for street and area lighting equipment. Mechanical, electrical, and marking requirements are established for dimming, locking type photocontrols and mating receptacles. All requirements of ANSI C136.10-2010, for photocontrols and receptacles, shall apply except where specifically superseded by this standard.