1. An apparatus comprising: at least one computer memory that is not a transitory signal and that comprises instructions executable by at least one processor toe receive at least first and second geographic regions representing respective first and second lighting requirements, the first and second geographic regions intersecting each other to define an intersection area; establish a lighting performance from the first and second lighting requirements, the lighting performance defining at least one illumination parameter of at least a first street light assembly positioned to direct light Into the intersection area.