1. A goal-based lighting controller, the goal-based lighting controller comprising: a network interface; a lighting system model of a lighting system, the lighting system comprising a plurality of individual light fixtures that light a site; a graphical user interface configured to concurrently graphically display a plurality of management goals for operation of the lighting system, wherein the plurality of management goals that are concurrently graphically displayed comprise two or more of a productivity, maintenance, energy or aesthetics management goal, wherein the plurality of management goals that are concurrently graphically displayed do not identify operational parameters of the individual light fixtures that light the site, the graphical user interface further configured to receive a respective management goal value for a respective one of the two or more management goals for operation of the lighting system, and wherein the respective management goal values also do not identify operational parameters of the individual light fixtures that light the site; a goal module configured to receive the respective two or more management goal values from the graphical user interface; a demand model configured to convert the two or more management goal values into a power level for at least one of the individual light fixtures, wherein the demand model determines that a modeled operation of the at least one of the individual light fixtures at the power level indicates the two or more management goal values would be met if the at least one of the individual light fixtures was operated at the power level; and a hardware interface module in communication with the network interface, wherein the hardware interface module is configured to cause the at least one of the individual light fixtures to operate at the power level.