The invention relates to a system comprising providing means for providing data, electing means for electing one or more parameters associated to said data, assessment means for assessing at least one characteristic of at least one of said elected parameter, and a lighting system for office rooms which comprises one or more light sources, the lighting system being capable of emitting light of different characteristic to the office room. The system is configured such that the characteristic of the light emitted to the office room is changed depending on the characteristic of the elected parameter.