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

High pressure Sodium ballasts works when the bulbs start at both ends of the arc tube electrodes arcing sodium mercury in the tube due to the high temperature of the arc to Qi heat evaporation of mercury vapor and sodium vapor, cathode emission electric sports to the anodeprocess, impact discharge substances atom, to get the energy generating ionizing excitation, and then revert to the stable state from the excited state; becomes excited state or ionized, then back pentyl infinite loop, the excess energy to optical radiationthe form of release, they produce the light. hps ballasts discharge substance the high vapor pressure, i.e., high density of sodium atoms