China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

A lamp needs energy to light up, but the energy it draws is generally more than it really needs. To get the lamp closer to the necessary amount of energy rather than the excess it takes in, a fluorescent ballast is connected to the lamp. Each ballast type is different but works by adding an electrical load to the lamp and then including a negative resistance and resistors to balance the energy. Inclusion of an electronic ballast will increase lamp life and lower operating costs.

Electronic ballasts regulate the electric flow inside the bulb through electronic circuitry. Sometimes referred to as control gear, the electronic ballast limits the current which flows in an electric circuit. This type of ballast is employed to balance the negative resistance to power supplies with positive resistance. As a result, the current is kept at a level that prevents the bulb from burning out. Electronic ballasts may operate in parallel or in a series mode. The series mode is preferred because the failure of a single lamp does not disrupt the working of all other lamps. The high frequency electronic ballast is another type that makes use of electric circuitry. It uses frequencies that are above 20,000Hz.