Luminaire comprising - a first light source for generating a first light with a first spectral distribution ( S 1 ( λ )), wherein the first light is represented by a first color locus ( F1 ) in a color diagram, - a second light source for generating a second light with a second spectral distribution ( S 2 ( λ )), wherein the second light is represented by a second color locus ( F2 ) in the color diagram, wherein the second spectral distribution ( S 2 ( λ )) is different from the first spectral distribution ( S 1 (λ )), - a control unit for controlling the first light source and the second light source , which is designed such that an intensity of the first light can be changed independently of an intensity of the second light, wherein the luminaire is designed such that the first color locus ( F1 ) substantially corresponds to the second color locus ( F2 ), characterized in that the first color locus ( F1 ) and the second color locus ( F2 ) are located within a seven-step MacAdam ellipse, wherein the control unit is designed to reduce the intensity of the first light and at the same time to increase the intensity of the second light in order to change the melanopic effect of the light emitted by the luminaire without the color impression and the intensity of the light emitted by the luminaire overall changing. - a first light source for generating a first light with a first spectral distribution ( S 1 ( λ )), wherein the first light is represented by a first color locus ( F1 ) in a color diagram, - a second light source for generating a second light with a second spectral distribution ( S 2 ( λ )), wherein the second light is represented by a second color locus ( F2 ) in the color diagram, wherein the second spectral distribution ( S 2 ( λ )) is different from the first spectral distribution ( S 1 (λ )), - a control unit for controlling the first light source and the second light source , which is designed such that an intensity of the first light can be changed independently of an intensity of the second light, wherein the luminaire is designed such that the first color locus ( F1 ) substantially corresponds to the second color locus ( F2 ), characterized in that the first color locus ( F1 ) and the second color locus ( F2 ) are located within a seven-step MacAdam ellipse, wherein the control unit is designed to reduce the intensity of the first light and at the same time to increase the intensity of the second light in order to change the melanopic effect of the light emitted by the luminaire without the color impression and the intensity of the light emitted by the luminaire overall changing. wherein the luminaire is designed such that the first color locus ( F1 ) substantially corresponds to the second color locus ( F2 ), characterized in that the first color locus ( F1 ) and the second color locus ( F2 ) are located within a seven-step MacAdam ellipse, wherein the control unit is designed to reduce the intensity of the first light and at the same time to increase the intensity of the second light in order to change the melanopic effect of the light emitted by the luminaire without the color impression and the intensity of the light emitted by the luminaire overall changing. <EOS>