Light module comprising : - a light source with a carrier and at least two light emitters arranged on said carrier and having a common electrode (4.2/6.1) ; - a power supply circuit for the light emitters ; the power supply circuit comprises a current source connected by switches to the light emitters of the light source, and a control circuit for controlling said switches so as to be able to selectively supply each of said emitters with the current source , the light emitters 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 comprise a first and a second switch , 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 , the light module being characterized in that each of the light emitters 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 comprising a third and a fourth switch , 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 , respectively, in that the loopback circuit comprises a voltage source , and in that each of the light emitters 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 . - a light source with a carrier and at least two light emitters arranged on said carrier and having a common electrode (4.2/6.1) ; - a power supply circuit for the light emitters ; the power supply circuit comprises a current source connected by switches to the light emitters of the light source, and a control circuit for controlling said switches so as to be able to selectively supply each of said emitters with the current source , the light emitters 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 comprise a first and a second switch , 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 , the light module being characterized in that each of the light emitters 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 comprising a third and a fourth switch , 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 , respectively, in that the loopback circuit comprises a voltage source , and in that each of the light emitters 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 . <EOS>