An airfield lighting system is provided, the system including a constant current regulator configured to output a constant current, a plurality of insulating transformers configured to be electrically connected to the constant current regulator to supply an electric power, and a plurality of individual lighting devices each electrically connected to the insulating transformer to turn on or turn off an LED lamp, wherein the individual lighting apparatus includes an LED unit including an ADC (AC-DC Converter) and at least one LED lamp connected to a secondary side of the ADC and transmitting defect information of the LED lamp, and a defect information receiver configured to measure a current and a voltage at a primary side of the ADC, measure an electric energy (electricity) or a resistance value using the measured current and voltage, and generate status information of the LED unit.