a driving arrangement for light emitting diode based illumination constituted of : a comparison circuitry arranged to compare an integral of a target current over a target illumination time for at least one led based luminaire with an integral of an illumination current over an illumination time for the at least one led based luminaire , the comparison circuitry arranged to output a comparison signal ; and a control circuitry in communication with the comparison circuitry and arranged to alternately : allow the flow of electrical current through the at least one led based luminaire responsive to a first condition of the comparison signal ; and prevent the flow of electrical current through the at least one led based luminaire responsive to a second condition of the comparison signal , the second condition different from the first condition .