Abstract: An illumination device (100) with wake-up and/or fall-asleep functionality comprises: at least one controllable light source (110); a control device (120) for controlling the light source (110). In a STEADY mode, colour and intensity of the output light are maintained constant at a steady colour value and a steady intensity value. In a WAKE-UP mode, the intensity of the output light is gradually increased from zero to the steady intensity value; in a FALL-ASLEEP mode, the intensity of the out-put light is gradually decreased from the steady intensity value to zero. The control device (120) comprises a user input (UI) for receiving a user input signal defining the steady intensity value. The control device (120) generates a control signal for the controllable light source (110) such as to cause the colour of the output light to travel a predetermined path in a colour space, independent of the steady intensity value.