How to judge the quality of electronic ballast
According to the international standard, light 1 second at 20%, more than 4 seconds 80% brightness is good ballast, while 80% of that moment of brightness or four seconds can not meet the standards of the brightness of the ballast quality is poorer.
The output of the electronic ballast has four root wiring, has two root is at the ends of the string in a capacitor, the other two root is the voltage output, if there is no high frequency ac voltage output voltage output, is defective. Electronic ballast is generally shock tube is damaged, the common failures 堦 resonance capacitance is damaged, and the filter capacitor leakage.
Usually it's a light tube. Because it's much more difficult to check the components and the circuitry than the tube, nobody does that.
