Control process for a mixed light source having a plurality of individual light sources (6.1, 6.2, 6.3) of different colours in pairs, wherein a converter receives first control data, which are destined for the plurality of individual light sources (6.1, 6.2, 6.3), and the individual light sources (6.1, 6.2, 6.3) are controlled according to the second control data, wherein the total nominal power of the mixed light sources is limited, characterized by the fact that the converter carries out the following steps: - to determine a one-dimensional distribution value from the capacities of the individual light sources (6.1, 6.2, 6.3) given by the first control data according to a function of representation, which one-dimensional distribution value depends only on the ratio of the given capacities to each other, which function of representation assumes a first global extremum if all of the given capacities are equal, and assumes a second global extremum opposed to the first global extremum if exactly one of the given capacities differs zero, - wherein the one-dimensional distribution value is inserted into a continuous weighting function which can be differentiated at least once, to determine a weighting factor which corresponds to the ratio of the permissible nominal power of one of the individual light sources to the permissible nominal power of the entire mixed light source, which weighting function, depending on the one-dimensional distribution value, is continuous or can be differentiated continuously at least once, and - wherein the capacities given by the first control data are multiplied with the weighting factor each and thus the second control data are generated so that the ratio of the weighted capacities to each other does not change, wherein, before the first control data are received for the first time, the user sets at least one parameter of the weighting function. - to determine a one-dimensional distribution value from the capacities of the individual light sources (6.1, 6.2, 6.3) given by the first control data according to a function of representation, which one-dimensional distribution value depends only on the ratio of the given capacities to each other, which function of representation assumes a first global extremum if all of the given capacities are equal, and assumes a second global extremum opposed to the first global extremum if exactly one of the given capacities differs zero, - wherein the one-dimensional distribution value is inserted into a continuous weighting function which can be differentiated at least once, to determine a weighting factor which corresponds to the ratio of the permissible nominal power of one of the individual light sources to the permissible nominal power of the entire mixed light source, which weighting function, depending on the one-dimensional distribution value, is continuous or can be differentiated continuously at least once, and - wherein the capacities given by the first control data are multiplied with the weighting factor each and thus the second control data are generated so that the ratio of the weighted capacities to each other does not change, wherein, before the first control data are received for the first time, the user sets at least one parameter of the weighting function.