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

Fluorescent T8 fluorescent ballasts power parameters:
The 40W magnetic ballast power to 9W, 30W magnetic ballast power 8W, 20W magnetic ballast power 7W two numbers together to count the total power of each lamp.
Inductance coil in order to start using instant of power generated by high-voltage breakdown of mercury vapor lamp, the lamp begins to glow; the fluorescent ballast lamp starts using inductive reactance control lamp current, fluorescent low power factor Usually about 0.5.