What is a ballast for use? How much is it?
The price is cheap, dozens of yuan. The local lamps and lanterns market is sold, or online shopping. In the case of people, try to buy power factor as much as possible so that you can save electricity. And buy a match.
Give the fluorescent lamp a ballast current. According to the wattage of lamp tube, the average household is about 10.
The average is not expensive a few blocks to a dozen, easily not bad, basically be the life that protects the lamp tube, steady current
When light through the high pressure after start-up, voltage drop, current increase, such as unrestricted, lamp current will continue to increase until the lamps may be burned, and so must be concatenated in the discharge lamp lighting circuit a ballast and lamp type, specification matching with the lamps start high start voltage, and limit the lamp current make the stability of a specified range.
I'm an electrician. The ballast is divided into electronic ballast and inductance ballast. Because the tube is sensitive to current changes. Due to unstable voltage, the current instability can cause the lamp to be damaged. The function of a ballast is to stabilize voltage and current.
