Disclosed is a system (100) comprising a head-mountable eye tracking sensor (116), a processor (110) coupled to said eye tracking sensor and at least one light source (120, 20′) under control of said processor, wherein the at least one light source is arranged to generate a configurable luminous distribution (10, 20) into a field of view of the wearer of the eye tracking sensor; and the processor is adapted to configure said luminous distribution in response to eye tracking data obtained from said eye tracking sensor. A method of controlling such a system and a computer program product for implementing such a method are also disclosed.