A lighting system , comprising: a solar tube including an inlet for capturing natural light; at least one multimode artificial ambient light source which is installed within at least one component of the solar tube so that light emitted from the multimode artificial ambient light source mixes with the natural light supplied by the solar tube; at least one control unit which is coupled to the multimode artificial ambient light source ; characterized in that the lighting system further comprises: at least one environmental sensor coupled to the control unit , wherein the environmental sensor is configured to detect at least one color and intensity characteristic of the natural light or the mixed light and to output an output signal to the control unit based on said color and intensity characteristic detected; and wherein the at least one control unit is configured to output at least one control signal to the multimode artificial ambient light source , wherein based on the output signal produced by the environmental sensor the control unit outputs at least one output signal to the multimode artificial ambient light source , which is configured to output light of varying color and color temperature in response to said at least one control signal. a solar tube including an inlet for capturing natural light; at least one multimode artificial ambient light source which is installed within at least one component of the solar tube so that light emitted from the multimode artificial ambient light source mixes with the natural light supplied by the solar tube; at least one control unit which is coupled to the multimode artificial ambient light source ; characterized in that the lighting system further comprises: at least one environmental sensor coupled to the control unit , wherein the environmental sensor is configured to detect at least one color and intensity characteristic of the natural light or the mixed light and to output an output signal to the control unit based on said color and intensity characteristic detected; and wherein the at least one control unit is configured to output at least one control signal to the multimode artificial ambient light source , wherein based on the output signal produced by the environmental sensor the control unit outputs at least one output signal to the multimode artificial ambient light source , which is configured to output light of varying color and color temperature in response to said at least one control signal. at least one environmental sensor coupled to the control unit , wherein the environmental sensor is configured to detect at least one color and intensity characteristic of the natural light or the mixed light and to output an output signal to the control unit based on said color and intensity characteristic detected; and wherein the at least one control unit is configured to output at least one control signal to the multimode artificial ambient light source , wherein based on the output signal produced by the environmental sensor the control unit outputs at least one output signal to the multimode artificial ambient light source , which is configured to output light of varying color and color temperature in response to said at least one control signal. <EOS>