According to the invention, a luminaire (1) comprises at least two light sources (14, 15), at least two drivers (11, 12), each for a respective light source (14, 15), and a sensor (131) that is configured to measure an amount of incident light. The at least two drivers (11, 12) can be classified into drivers for a light source that emits direct light and drivers for a light source that emits indirect light. Furthermore, the luminaire (1) comprises a controller (13) that is configured to control the operation of the at least two drivers (11, 12) by means of sequentially switching on the at least two drivers (11, 12). Preferably, sequentially switching on a driver means that before a driver (11, 12) is switched on, the previously switched on driver (11, 12) is switched off again. The sensor (131) provides intensity information corresponding to the amount of light measured by the sensor (131) for each time period when a driver (11, 12) is switched on. The obtained intensity information (measured intensity) is evaluated and each of the at least two drivers (11, 12) is associated with a corresponding intensity information, respectively. Based thereon each of the at least two drivers (11, 12) is assigned respectively to either a group that corresponds to direct light or a group that corresponds to indirect light based on the evaluation results.