A lighting system for dispensing units such as ice and water dispensers on refrigerators includes a paddle on a shaft for activating and deactivating the dispenser by force applied from a receptacle. The lid body turnably supporting mechanism has a first turning shaft with its axial direction extending in parallel to a principal surface of the apparatus main body, and a second turning shaft provided at one end of the first turning shaft in such a manner as to be perpendicular to the principal surface of the apparatus main body. A fine gain control stage provides a fine gain control of the overall gain value.