A method controls the light exposure of an individual during a given time period. A control unit is provided for controlling lights. A first sensor is worn by the individual and gathers light exposure data including lighting intensity data and Kelvin temperature data experienced by the individual. Second sensors are disposed in a building for collecting emitted light data emitted in the building. The emitted light data and the light exposure data are transmitted to the control unit. The light data, along with desired data including desired light intensity and desired Kelvin temperature are stored. The optimal light exposure for the individual is determined based on the light data or the desired data, and an output signal is generated based on the optimal light exposure. The lights are controlled based on the output signal to produce an overall light intensity and Kelvin temperature pattern per day for the individual.
