Abstract: A medical surgery or examination room and a method for illuminating such a room, wherein a substantial part of the room or the entire room is illuminated with coloured lighting different from white lighting in order to achieve beneficial psychological effects or, primarily, to improve working condition. For example, green light may be provided behind the monitors used by a surgeon during operation and red light in a zone behind a surgeon during operation or examination. The lighting may be controlled by a computer with a touch screen interface.