The most essential task of a luminaire is to direct the lamp lumens; whereby, a light distribution is striven for that corresponds to the particular job of the luminaire for the best possible utilisation of the energy used. A step towards a targeted and specific light control was realised by the introduction of the reflector lamps and PAR lamps. The light is focused by reflectors integrated into the lamp and can be directed in the desired direction with defined beam emission angles. The demand for more differentiated lighting control, for enhanced luminaire efficiency and improved glare limitation led to the reflector being taken from the lamp and integrated into the luminaire. This means that it is possible to construct luminaires that are designed to meet the specific requirements of the light source and the task.