Abstract: The present Invention provides 2-lamp parallel-type and 2-lamp serial-type fluorescent lamp fixtures, in which 2-lamp lighting and 1-lamp lighting are switchable according to an ON/OFF operation of a power supply switch. In a 2-lamp parallel-type or 2-lamp serial-type fluorescent lamp fixture provided with an inverter-type stabilizer, 2-lamp lighting and 1-lamp lighting are switched by a first control circuit (19, 117) operated according to an ON/OFF operation of a power supply switch (12). In the case of the 2-lamp parallel-type fluorescent lamp fixture, the switching is performed by a switching means (18). In the case of the 2-lamp serial-type fluorescent lamp fixture, the switching is performed by light turning-off circuits (113A, 113B) electrically connecting both terminals of a fluorescent lamp. A second control circuit (20, 131) may be provided to switch the 2-lamp lighting and the 1-lamp lighting of the fluorescent lamps according to an external instruction of a PC or the like.

Abstract: The present Invention provides 2-lamp parallel-type and 2-lamp serial-type fluorescent lamp fixtures, in which 2-lamp lighting and 1-lamp lighting are switchable according to an ON/OFF operation of a power supply switch. In a 2-lamp parallel-type or 2-lamp serial-type fluorescent lamp fixture provided with an inverter-type stabilizer, 2-lamp lighting and 1-lamp lighting are switched by a first control circuit (19, 117) operated according to an ON/OFF operation of a power supply switch (12). In the case of the 2-lamp parallel-type fluorescent lamp fixture, the switching is performed by a switching means (18). In the case of the 2-lamp serial-type fluorescent lamp fixture, the switching is performed by light turning-off circuits (113A, 113B) electrically connecting both terminals of a fluorescent lamp. A second control circuit (20, 131) may be provided to switch the 2-lamp lighting and the 1-lamp lighting of the fluorescent lamps according to an external instruction of a PC or the like.