In a control unit (8) for a lighting control system, wherein the control unit (8) is configured to calculate output values based on input values and the output values include control commands for a lighting installation (4, 6, 7.1, 7.2), the input values include information about a light distribution in a view field of an office occupant (2), and the control unit (8) is configured to calculate said output values based on said input values in such a way that discomfort glare for the office occupant (2) is avoided, while sufficient workplane illuminance is guaranteed and electricity consumption is minimized.