Traditional Culture Encyclopedia - The 24 Solar Terms - Why is the working current of 15W energy-saving lamp 0.25A?

Why is the working current of 15W energy-saving lamp 0.25A?

Energy-saving lamps use AC power.

When the lamp works, the voltage is about 70 volts, but it needs more than 500 volts to ignite the gas in the lamp, which is generated by ballasts (mainly electronic ballasts at present), and different lamp voltages will be different.

The operating voltage is different from the ignition voltage. The voltage on the lamp+the voltage on the ballast is not equal to the power supply voltage (because the impedance characteristics of the load are different and the voltage phase is different).