A method for operating an automotive lighting device comprising at least a first light module and a second light module , each one of the light modules comprising solid-state light sources , the method comprising the steps of: - providing a first preliminary current profile to feed the first light module so that the first light module produces a light flux greater than a first flux threshold value, - calculating a first preliminary derating time associated to the first preliminary current profile , wherein the first preliminary current profile involves a first preliminary amount of current until the first preliminary derating time ; - providing a second preliminary current profile to feed the second light module so that the second light module produces a light flux greater than a second flux threshold value - calculating a second preliminary derating time associated to the second preliminary current profile, the second preliminary derating time being higher than the first preliminary derating time , wherein the second preliminary current profile involves a second preliminary amount of current until the second preliminary derating time ; - feeding the first light module with a first current profile which provides a total amount of current lower than the first preliminary amount of current, calculated until the first preliminary derating time ; - feeding the second light module with a second current profile which provides a total amount of current higher than the second preliminary amount of current, calculated until the second preliminary derating time ; - the method characterised in that the first current profile and the second current profile comprise starting with a first current value and increasing the current value when a predetermined condition is reached. - providing a first preliminary current profile to feed the first light module so that the first light module produces a light flux greater than a first flux threshold value, - calculating a first preliminary derating time associated to the first preliminary current profile , wherein the first preliminary current profile involves a first preliminary amount of current until the first preliminary derating time ; - providing a second preliminary current profile to feed the second light module so that the second light module produces a light flux greater than a second flux threshold value - calculating a second preliminary derating time associated to the second preliminary current profile, the second preliminary derating time being higher than the first preliminary derating time , wherein the second preliminary current profile involves a second preliminary amount of current until the second preliminary derating time ; - feeding the first light module with a first current profile which provides a total amount of current lower than the first preliminary amount of current, calculated until the first preliminary derating time ; - feeding the second light module with a second current profile which provides a total amount of current higher than the second preliminary amount of current, calculated until the second preliminary derating time ; - the method characterised in that the first current profile and the second current profile comprise starting with a first current value and increasing the current value when a predetermined condition is reached. <EOS>