Energy saving of FCL-type circular fluorescent lamps

Abstract

FCL-type circular fluorescent lamps(FCLs) are still widely used for residential lighting in Japan, and expected to reduce the power consumption. We have therefore developed energy-saving FCLs. Ar/Kr mixed gas is utilized to decrease the impedance of the arc, and the distance from the end of the lamp tube to the electrode is increased to decrease the arc length. As a result, we have achieved to reduce the power consumption of new FCLs by approximately 5% of that of conventional FCLs in case of using with the electronic ballast having regular current output.