Luminaire - comprising a plurality of lamps inserted into the luminaire, - comprising a control device for operating the inserted lamps, - wherein the respective lamp has at least one power connection socket for supplying power to the respective lamp, - wherein the luminaire has for each lamp inserted therein at least one holder for holding the inserted lamp, wherein at least one such holder is configured as a power connection holder which is electrically connected to the control device and cooperates with the power connection socket of the inserted lamp for supply of power to the latter, - wherein for each inserted lamp the luminaire has a respective coding holder for coupling with an exchangeable coding (15, 21) which correlates with an electrical voltage and/or with an electrical current for operating the respective lamp, - wherein the respective coding holder is electrically connected to the control device and serves for the generation and transmission to the control device of a coding signal dependent on the respective coding (15, 21), - wherein the control device is configured and/or programmed in such a way that, depending on the respective coding signal, it selects and executes a power supply specified in terms of current and/or voltage by the respective coding (15, 21), for operating the respective lamp, characterised in that, - the respective coding has a coding socket which is separate with respect to the respective lamp, is configured to be complementary to the respective coding holder and can be inserted therein for coupling with the respective coding holder, - the respective coding holder is separate with respect to the respective power connection holder, so that each coding socket can be connected separately from the respective lamp to the respective coding holder, - the coding socket inserted into the respective coding holder cooperates with the respective coding holder for generation and transmission of the respective coding signal to the control device, - each coding socket has at least one respective coding element which is electrically connected to electrical socket contacts (22, 23) of the coding socket, which are electrically connected to electrical socket contacts (24, 25) of the respective coding holder when the coding socket is inserted into the respective coding holder, wherein the respective coding element determines the coding signal that can be generated and transmitted, - each coding socket has a socket housing which contains the socket contacts (22, 23) and the respective coding element, - the two socket contacts (22, 23) and the respective coding element are arranged on an insert element which represents a separate component with respect to the socket housing and which is inserted into the socket housing. - comprising a plurality of lamps inserted into the luminaire, - comprising a control device for operating the inserted lamps, - wherein the respective lamp has at least one power connection socket for supplying power to the respective lamp, - wherein the luminaire has for each lamp inserted therein at least one holder for holding the inserted lamp, wherein at least one such holder is configured as a power connection holder which is electrically connected to the control device and cooperates with the power connection socket of the inserted lamp for supply of power to the latter, - wherein for each inserted lamp the luminaire has a respective coding holder for coupling with an exchangeable coding (15, 21) which correlates with an electrical voltage and/or with an electrical current for operating the respective lamp, - wherein the respective coding holder is electrically connected to the control device and serves for the generation and transmission to the control device of a coding signal dependent on the respective coding (15, 21), - wherein the control device is configured and/or programmed in such a way that, depending on the respective coding signal, it selects and executes a power supply specified in terms of current and/or voltage by the respective coding (15, 21), for operating the respective lamp, characterised in that, - the respective coding has a coding socket which is separate with respect to the respective lamp, is configured to be complementary to the respective coding holder and can be inserted therein for coupling with the respective coding holder, - the respective coding holder is separate with respect to the respective power connection holder, so that each coding socket can be connected separately from the respective lamp to the respective coding holder, - the coding socket inserted into the respective coding holder cooperates with the respective coding holder for generation and transmission of the respective coding signal to the control device, - each coding socket has at least one respective coding element which is electrically connected to electrical socket contacts (22, 23) of the coding socket, which are electrically connected to electrical socket contacts (24, 25) of the respective coding holder when the coding socket is inserted into the respective coding holder, wherein the respective coding element determines the coding signal that can be generated and transmitted, - each coding socket has a socket housing which contains the socket contacts (22, 23) and the respective coding element, - the two socket contacts (22, 23) and the respective coding element are arranged on an insert element which represents a separate component with respect to the socket housing and which is inserted into the socket housing.