A lighting device, comprising: - a first light radiation source emitting white light radiation with a first color temperature, - a second light radiation source emitting white light radiation with a second color temperature, different from the first color temperature of the first light radiation source, and - a third light radiation source emitting non-white light radiation of a green color, - the first, second and third light radiation sources arranged on a support member wherein light radiation emitted from the lighting device is mixed light radiation from the first, second and third light radiation sources having a color temperature between the first color temperature of the first light radiation source and the second color temperature of the second light radiation source, wherein: - the light radiation sources (141, 142, 143) comprise electrically-powered light radiation sources wherein the emitted light flux is selectively variable as a function of the voltage and/or current applied thereto, - the device comprises a driver circuit coupled to the light radiation sources (141, 142, 143) to selectively vary the light flux of the light radiation sources (141, 142, 143) by varying the voltage and/or current applied thereto; characterised in that the driver circuit is configured to: - supply the light radiation sources (141, 142, 143) with pulse width modulated signals having a variable duty-cycle, and - perform dimming of light radiation from the light radiation sources (141, 142, 143) by reducing the duty-cycle of said pulse width modulated signals from an upper to a lower value by keeping the duty-cycle of the supply signals to the first and third radiation sources smaller than the duty-cycle of the supply signal to the second light radiation source. - a first light radiation source emitting white light radiation with a first color temperature, - a second light radiation source emitting white light radiation with a second color temperature, different from the first color temperature of the first light radiation source, and - a third light radiation source emitting non-white light radiation of a green color, - the first, second and third light radiation sources arranged on a support member wherein light radiation emitted from the lighting device is mixed light radiation from the first, second and third light radiation sources having a color temperature between the first color temperature of the first light radiation source and the second color temperature of the second light radiation source, - the light radiation sources (141, 142, 143) comprise electrically-powered light radiation sources wherein the emitted light flux is selectively variable as a function of the voltage and/or current applied thereto, - the device comprises a driver circuit coupled to the light radiation sources (141, 142, 143) to selectively vary the light flux of the light radiation sources (141, 142, 143) by varying the voltage and/or current applied thereto; characterised in that the driver circuit is configured to: - supply the light radiation sources (141, 142, 143) with pulse width modulated signals having a variable duty-cycle, and - perform dimming of light radiation from the light radiation sources (141, 142, 143) by reducing the duty-cycle of said pulse width modulated signals from an upper to a lower value by keeping the duty-cycle of the supply signals to the first and third radiation sources smaller than the duty-cycle of the supply signal to the second light radiation source. - supply the light radiation sources (141, 142, 143) with pulse width modulated signals having a variable duty-cycle, and - perform dimming of light radiation from the light radiation sources (141, 142, 143) by reducing the duty-cycle of said pulse width modulated signals from an upper to a lower value by keeping the duty-cycle of the supply signals to the first and third radiation sources smaller than the duty-cycle of the supply signal to the second light radiation source.