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Fluorescent Ballast For 20W Lamp is a durable and long lasting semi low loss ballast for a fluorescent for a fluorescent 20W lamp. This device are used to limit the amount of current through the tube.
Ballasts limit the current through an electrical load. These are most often used when a load presents a negative (differential) resistance to the supply. If such a device were connected to a constant-voltage power supply, it would draw an increasing amount of current until it was destroyed or caused the power supply to fail.
To prevent this, a ballast provides a positive resistance that limits the current. During lamp starting, the ballast must briefly supply high voltage to establish an arc between the two lamp electrodes. Once the arc is established, the ballast quickly reduces the voltage and regulates the electric current to produce a steady light output.
This brand new Fluorescent Ballast For 20W Lamp provide the proper starting and operating electrical condition to power a fluorescent lamp, neon lamp, or high intensity discharge (HID) lamp.
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