A stadium lighting system comprising: at least one sensor (201a, 201b, 201c) configured to determine light intensity values for multiple locations within a stadium, wherein the at least one sensor comprises at least two cameras (201a, 201b, 201c), each camera located at a different known position within the stadium; said stadium lighting system characterised in that each camera is configured to view the multiple locations from different viewing orientations such that each camera is configured to determine a light intensity value for each location, wherein the light intensity value is a vector with at least two directional components representing the light intensity as sensed from two separate directions respectively; and said stadium lighting system further comprising multiple electronically controllable luminaires, wherein the multiple electronically controllable luminaires are adjustable in order to change their orientation, and wherein at least one electronically controllable luminaire is configured to generate light directed towards at least one location of the multiple locations within the stadium based on a received control parameter; a controller configured to receive the light intensity values from the at least one sensor (201a, 201b, 201c), further configured to determine a light intensity difference based on the light intensity values from the multiple locations within the stadium, wherein the light intensity difference comprises a single scalar light intensity difference value; and wherein the controller is further configured to select the at least one electronically controllable luminaire and generate a control parameter for the at least one electronically controllable luminaire based on the light intensity difference to attempt to reduce the light intensity difference, wherein said control parameter comprises a luminaire orientation. at least one sensor (201a, 201b, 201c) configured to determine light intensity values for multiple locations within a stadium, wherein the at least one sensor comprises at least two cameras (201a, 201b, 201c), each camera located at a different known position within the stadium; said stadium lighting system characterised in that each camera is configured to view the multiple locations from different viewing orientations such that each camera is configured to determine a light intensity value for each location, wherein the light intensity value is a vector with at least two directional components representing the light intensity as sensed from two separate directions respectively; and said stadium lighting system further comprising multiple electronically controllable luminaires, wherein the multiple electronically controllable luminaires are adjustable in order to change their orientation, and wherein at least one electronically controllable luminaire is configured to generate light directed towards at least one location of the multiple locations within the stadium based on a received control parameter; a controller configured to receive the light intensity values from the at least one sensor (201a, 201b, 201c), further configured to determine a light intensity difference based on the light intensity values from the multiple locations within the stadium, wherein the light intensity difference comprises a single scalar light intensity difference value; and wherein the controller is further configured to select the at least one electronically controllable luminaire and generate a control parameter for the at least one electronically controllable luminaire based on the light intensity difference to attempt to reduce the light intensity difference, wherein said control parameter comprises a luminaire orientation.