Abstract

An uninterruptible fluorescent lamp circuit available for emergency lighting is comprised of an oscillatory boosting circuit which generates a high-frequency, high-voltage power, and a current-limiting circuit which limits current flowing to the fluorescent lamp (the load). Such a fluorescent lamp circuit can provide enough high-voltage power to activate the lamp without the need to use any conventional starter and stabilizer. The currentlimiting circuit uses transistors activated at a fixed voltage and a current-limiting resistance which slows the current. A voltageleading power output is generated which prevents the fluorescent lamp from burning out due to a current-leading power output. Since the power source is a high-frequency, high-voltage current, the flicker of the lamp can be effectively reduced. A battery is connectable to provide an unterruptible power source during an external power failure.