A circuit component for selectively switching on one of at least two light sources (50, 52) of a light signal emitter representing different signalling states, wherein the circuit component comprises at least two connectors (12, 14) for connecting to two poles of a potential, further comprising: - parallel-connected light source connectors (16, 18) for connecting the light sources (50, 52), - a number of switching devices (20, 22, 24, 26) for establishing an electrical connection between the connectors (12, 14) of the switching device, specifically at least two first switching devices (20, 22), which are connected for switching on a light source (50, 52) respectively connected to one of the light source connectors (16, 18) between the respective light source connector (16, 18) and one of the connectors (12, 14), and at least two second switching devices (24, 26), which are connected for short-circuiting respectively one light source (50, 52) connected to one of the light source connectors (16, 18), between one of the first switching devices (20, 22) and one of the connectors (12, 14), characterised by - a control for the light sources (50, 52) with a function for each of the light sources (50, 52) for ensuring that when one of the first light source(s) representing a first signalling state is switched on by means of the first switching device(s), the light source(s) representing the other signalling state or signalling states is (are) short-circuited via the second switching device(s) associated therewith, - wherein the control for each light source connector (16, 18) comprises a series connection such that when light sources (50, 52) are connected, a current connector (20A, 22A) of the first switching device (20, 22) provided for switching on the respective light source (50, 52) and a current connector (24B, 26B) of the second switching device (24, 26) provided for short-circuiting the other light source(s) (50, 52) are connected in series. - parallel-connected light source connectors (16, 18) for connecting the light sources (50, 52), - a number of switching devices (20, 22, 24, 26) for establishing an electrical connection between the connectors (12, 14) of the switching device, specifically at least two first switching devices (20, 22), which are connected for switching on a light source (50, 52) respectively connected to one of the light source connectors (16, 18) between the respective light source connector (16, 18) and one of the connectors (12, 14), and at least two second switching devices (24, 26), which are connected for short-circuiting respectively one light source (50, 52) connected to one of the light source connectors (16, 18), between one of the first switching devices (20, 22) and one of the connectors (12, 14), characterised by - a control for the light sources (50, 52) with a function for each of the light sources (50, 52) for ensuring that when one of the first light source(s) representing a first signalling state is switched on by means of the first switching device(s), the light source(s) representing the other signalling state or signalling states is (are) short-circuited via the second switching device(s) associated therewith, - wherein the control for each light source connector (16, 18) comprises a series connection such that when light sources (50, 52) are connected, a current connector (20A, 22A) of the first switching device (20, 22) provided for switching on the respective light source (50, 52) and a current connector (24B, 26B) of the second switching device (24, 26) provided for short-circuiting the other light source(s) (50, 52) are connected in series.