Abstract: The invention concerns a window including a window pane with one or more glass panes, a window frame in which the window pane is provided, at least one temperature sensor arranged in or at the periphery of the window pane, and an electric circuit connected to the temperature sensor mounted on or in the window frame. The electric circuit is configured to be connected to an operation unit which is configured to regulate the incident light through the window pane. The invention furthermore concerns a method for controlling a window wherein the electric circuit controls the means configured to regulate the incident light through the window pane based on a set of parameters. The parameters are determined on the basis of the orientation and geographical position of the window whereby the supply of free energy is optimised and the amount of energy supplied from energy sources in the room is reduced.