A lighting controlling device of vehicle lighting equipment, comprising: switching regulators (14, 16) for supplying a current to a plurality of semiconductor light sources (1, 2, 3, 4, 5, 6, 7, 8) respectively; a plurality of current driving means (24, 26, 28, 30, 32, 34, 36, 38) each connected to a switching regulator (14, 16), characterized in that: the current driving means (24, 26, 28, 30, 32, 34, 36, 38) comprise switching means connected to the semiconductor light sources for controlling ON/OFF of the semiconductor light sources, for current-driving the semiconductor light sources at a maximum current value or a current value on average less than the maximum current value in response to respective operating states of the switching means; and in that the device further comprises: a controlling portion; and current setting means (20, 22), wherein each current setting means (20, 22) is configured to set a maximum current value applied in current-driving the current driving means connected to one switching regulator (14, 16) or a maximum current value of currents fed from one of the switching regulator (14, 16) to the semiconductor light sources in response to respective assignments from the controlling portion; and wherein the controlling portion is configured to control the current driving means and the current setting means in response to a plurality of lighting modes based on communication information from an external device; and wherein the controlling portion is configured to assign the maximum current value corresponding to each lighting mode to the current setting means for every lighting mode, and to assign ON/OFF periods of the switching means to the current driving means for every lighting mode. switching regulators (14, 16) for supplying a current to a plurality of semiconductor light sources (1, 2, 3, 4, 5, 6, 7, 8) respectively; a plurality of current driving means (24, 26, 28, 30, 32, 34, 36, 38) each connected to a switching regulator (14, 16), the current driving means (24, 26, 28, 30, 32, 34, 36, 38) comprise switching means connected to the semiconductor light sources for controlling ON/OFF of the semiconductor light sources, for current-driving the semiconductor light sources at a maximum current value or a current value on average less than the maximum current value in response to respective operating states of the switching means; and in that the device further comprises: a controlling portion; and current setting means (20, 22), wherein each current setting means (20, 22) is configured to set a maximum current value applied in current-driving the current driving means connected to one switching regulator (14, 16) or a maximum current value of currents fed from one of the switching regulator (14, 16) to the semiconductor light sources in response to respective assignments from the controlling portion; and wherein the controlling portion is configured to control the current driving means and the current setting means in response to a plurality of lighting modes based on communication information from an external device; and wherein the controlling portion is configured to assign the maximum current value corresponding to each lighting mode to the current setting means for every lighting mode, and to assign ON/OFF periods of the switching means to the current driving means for every lighting mode. a controlling portion; and current setting means (20, 22), wherein each current setting means (20, 22) is configured to set a maximum current value applied in current-driving the current driving means connected to one switching regulator (14, 16) or a maximum current value of currents fed from one of the switching regulator (14, 16) to the semiconductor light sources in response to respective assignments from the controlling portion; and wherein the controlling portion is configured to control the current driving means and the current setting means in response to a plurality of lighting modes based on communication information from an external device; and wherein the controlling portion is configured to assign the maximum current value corresponding to each lighting mode to the current setting means for every lighting mode, and to assign ON/OFF periods of the switching means to the current driving means for every lighting mode.