Method to easily and selectively adjust a desired brightness and/or colour of a specific spatial region onto which at least one light source is directed, comprising the steps: a) Using a mobile communication device to target the specific spatial region , with the mobile communication device recognising the targeted spatial region , 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 ; 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 characterised in that in step b), on the basis of the determined spatial region , 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 . a) Using a mobile communication device to target the specific spatial region , with the mobile communication device recognising the targeted spatial region , 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 ; 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 characterised in that in step b), on the basis of the determined spatial region , 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 . in step b), on the basis of the determined spatial region , 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 . <EOS>