Conventional fluorescent lights are supplied with an AC source through a power line so that an AC power source is supplied to a ballast (a choke coil) and subsequently a ballast voltage is stepwise raised up to a rated ballast voltage (e.g., 120 V or 133 V) and a fluorescent lamp is then put in series. As a result, the ballast voltage is stepwise raised up to the rated ballast voltage and a second rise of the ballast voltage raises a https://www.google.ws/url?q=/wp-content/uploads/2022/06/wynekris.pdf
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