Light module comprising: - a light source with a carrier and at least two light emitters (4, 6) arranged on said carrier and having a common electrode (4.2/6.1); - a power supply circuit for the light emitters (4, 6); the power supply circuit comprises a current source connected by switches (16, 18, 20, 22) to the light emitters (4, 6) of the light source, and a control circuit for controlling said switches (16, 18, 20, 22) so as to be able to selectively supply each of said emitters (4, 6) with the current source, the light emitters (4, 6) of the light source being configured to emit spectra of white light with colour temperatures differing from each other by at least 1000°K, and in that the switches (16, 18, 20, 22) comprise a first and a second switch (16, 18), the current source comprising a current input terminal.1) and a current output terminal (10.2) connected via the first switch and the second switch, respectively, to the common electrode (4.2/6).1) of the light emitters (4, 6), the light module being characterized in that each of the light emitters (4, 6) of the light source comprises a specific electrode (4.1, 6.2), the module comprising a looping circuit of said electrodes (4.1, 6.2), the switches (16, 18, 20, 22) comprising a third and a fourth switch (20, 22), the current input and output terminals (10.1, 10.2).2) of the current source being connected to said loopback circuit via the third and fourth switches (20, 22), respectively, in that the loopback circuit comprises a voltage source, and in that each of the light emitters (4, 6) of the light source is a light-emitting diode with a cathode (4.2, 6.2) and an anode (4.1, 6.1), the common electrode (4.2/6.1) of the light source corresponding to a cathode (4.2) and an anode (6.1) of said emitters (4, 6). - a light source with a carrier and at least two light emitters (4, 6) arranged on said carrier and having a common electrode (4.2/6.1); - a power supply circuit for the light emitters (4, 6); the power supply circuit comprises a current source connected by switches (16, 18, 20, 22) to the light emitters (4, 6) of the light source, and a control circuit for controlling said switches (16, 18, 20, 22) so as to be able to selectively supply each of said emitters (4, 6) with the current source, the light emitters (4, 6) of the light source being configured to emit spectra of white light with colour temperatures differing from each other by at least 1000°K, and in that the switches (16, 18, 20, 22) comprise a first and a second switch (16, 18), the current source comprising a current input terminal.1) and a current output terminal (10.2) connected via the first switch and the second switch, respectively, to the common electrode (4.2/6).1) of the light emitters (4, 6), the light module being characterized in that each of the light emitters (4, 6) of the light source comprises a specific electrode (4.1, 6.2), the module comprising a looping circuit of said electrodes (4.1, 6.2), the switches (16, 18, 20, 22) comprising a third and a fourth switch (20, 22), the current input and output terminals (10.1, 10.2).2) of the current source being connected to said loopback circuit via the third and fourth switches (20, 22), respectively, in that the loopback circuit comprises a voltage source, and in that each of the light emitters (4, 6) of the light source is a light-emitting diode with a cathode (4.2, 6.2) and an anode (4.1, 6.1), the common electrode (4.2/6.1) of the light source corresponding to a cathode (4.2) and an anode (6.1) of said emitters (4, 6).