Method to easily and selectively adjust a desired brightness and/or colour of a specific spatial region (3, 3') onto which at least one light source is directed, comprising the steps: a) Using a mobile communication device to target the specific spatial region (3, 3'), with the mobile communication device recognising the targeted spatial region (3, 3'), converting this information into at least a first signal and sending it to a data processing device; b) receiving the at least one first signal by the data processing device, with the data processing device converting the at least one first signal into the specific spatial region (3, 3'); c) inputting into the mobile communication device, with the mobile communication device converting the input into at least one second signal that is send to the data processing device; d) receiving the at least one second signal by the data processing device, with the data processing device converting the at least one second signal into a specific brightness value and/or colour value, generating at least one third signal based on this and sending it to the at least one light source; e) receiving the at least one third signal by the at least one light source, with the at least one light source converting the at least one third signal into the specified brightness value and/or colour value and changing its brightness and/or colour accordingly, so that the desired brightness and/or colour is achieved in the specific spatial region (3, 3') characterised in that in step b), on the basis of the determined spatial region (3, 3'), the data processing device identifies at least one light source as relevant for setting a desired brightness and/or colour, and the input into the mobile communication device in step c) is an input into the mobile communication device of the desired brightness and/or colour of the spatial region (3, 3'). a) Using a mobile communication device to target the specific spatial region (3, 3'), with the mobile communication device recognising the targeted spatial region (3, 3'), converting this information into at least a first signal and sending it to a data processing device; b) receiving the at least one first signal by the data processing device, with the data processing device converting the at least one first signal into the specific spatial region (3, 3'); c) inputting into the mobile communication device, with the mobile communication device converting the input into at least one second signal that is send to the data processing device; d) receiving the at least one second signal by the data processing device, with the data processing device converting the at least one second signal into a specific brightness value and/or colour value, generating at least one third signal based on this and sending it to the at least one light source; e) receiving the at least one third signal by the at least one light source, with the at least one light source converting the at least one third signal into the specified brightness value and/or colour value and changing its brightness and/or colour accordingly, so that the desired brightness and/or colour is achieved in the specific spatial region (3, 3') characterised in that in step b), on the basis of the determined spatial region (3, 3'), the data processing device identifies at least one light source as relevant for setting a desired brightness and/or colour, and the input into the mobile communication device in step c) is an input into the mobile communication device of the desired brightness and/or colour of the spatial region (3, 3'). in step b), on the basis of the determined spatial region (3, 3'), the data processing device identifies at least one light source as relevant for setting a desired brightness and/or colour, and the input into the mobile communication device in step c) is an input into the mobile communication device of the desired brightness and/or colour of the spatial region (3, 3').