This standard covers dimensional, maintenance, and light distribution features that permit the interchange of enclosed, post top-mounted high intensity discharge (HID), solid state (SSL) source (also referred to as LED (Light Emitting Diode)), and magnetic induction luminaires whose center of mass is approximately over the mounting tenon. Luminaires of similar size, shape, and weight meeting the requirements of this standard may be used interchangeably within a system with assurance that: ÔÇó They will fit the mounting tenon ÔÇó Pole strength requirements will not change ÔÇó Light distribution will be similar ÔÇó Similar maintenance procedures can be used