An earth leakage detection device includes a housing and an earth leakage detection circuit mounted within said housing for detecting earth leakage in the electrical distribution circuit. A control unit is provided to change the temporal change rate of electric power supplied to the discharge lamp during the transient time period in accordance with the increase of the change value or the time lapse. A first seal and a second seal, on the drive screw, form with the inner wall of the container and the outer wall of the drive screw an annular compartment for housing a cosmetic composition. The first selection portion selects a first pair of main bit lines and selection lines in order to select the memory cell to be read. The selection of the most appropriate operating gain mode state, is preferably determined in accordance with various metrics such as the received levels of the desired signal, levels of interference signals, bit error rate and receiver RSSI.