A kitchen unit (200), for example an extraction hood, has a task lighting system (100) for illuminating an operative area (210) below the kitchen unit. The task lighting system includes: at least a plurality of fixed lighting elements (110) configured to generate, on the operative area, corresponding fixed elementary light spots (270) and macro light spots (280) by the union of the elementary light spots; and a control unit (115) configured to receive a spot position signal indicative of a desired position of a macro light spot and to selectively activate, based on the spot position signal, the lighting elements to generate a macro light spot with said desired position.