LED LIGHTING SYSTEM

摘要

An LED lamp arrangement (1) adapted for fitting in a luminaire. The luminaire is adapted for a fluorescent lamp and having a ballast. The LED lamp arrangement has a plurality of LEDs (25, 26, 27 ) and two or more electrodes (22 ) for releasably connecting to the luminaire and for conducting current from the ballast for supply to the LEDs. The LED lamp arrangement further has a sensor circuit (21) and a protection circuit (24). The sensor circuit and the protection circuit are adapted to increase the total load impedance of the LED lamp arrangement if the ballast is a constant power electronic ballast.