What does the ballast mean
What the ballast means: a ballast that can drive two bulbs at the same time. There are two types of ballast: One is a lamp tube with an independent ballast, but outside is a Shared shell, the most reliable. Another is the so-called real yituo two, that is, a ballast (note, we say "a" is only a pair of triode) external two tubes.
The first is the utility of the previous power source and the main inverter circuit, and the output inductance and the resonant capacitance independently each carry a lamp tube. Second is that the whole circuit are common, but when I answer the tube with a small h inductor and a small capacity of the ceramics with high pressure to connect two tubes of IC (such as that made of so-called digital intelligent high-power ballast is).
A ballast can simultaneously drive two lamp tubes, in fact a ballast is two fully independent ballast, one of which is a lamp tube. Especially the energy-saving electronic ballast
