volts x amps = watts. Input and output will be slightly different do to losses to heat. The given is 108 watts out but the unknown is voltage and amperage. not to mention, i think there is a capacitance discharge to start the bulb.
I have no idea how to test the output of a ballast except to put in good bulbs. They can sometimes get week and not be able to fire older bulbs. If those same bulbs work in a different fixture, it's time for a ballast.
|