A method is presented for providing an output control parameter associated with a specific person for controlling a light output of a lamp adapted to vary said light output by said output control parameter. The control parameter is determined on the basis of a current time parameter representing the current local time of the day, a type parameter from a range of type parameters comprising at least a parameter representing a first person type and a parameter representing a second person type, and a gender parameter from a range of gender parameters comprising a parameter representing a male person and a parameter representing a female person.