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

HPS lamp characteristic curve:
HPS lamp power and lamp voltage linear characteristic curve is called the lamp, the lamp for a particular characteristic curve within a certain range by varying the power supply voltage or the ballast impedance, thereby changing the lamp voltage and power obtained when the lamp voltage is equal to the design voltage, the lamp power to achieve the design target power. The same model, same lamp power characteristics are approximately parallel, for those who have a higher lamp voltage, lamp of steepness of the slope of the characteristic curve is reduced.

HPS ballast characteristic curve:
When the high pressure sodium lamp at a constant input voltage continuous operation, the lamp voltage and lamp power change will follow the ballast characteristic curve. Two typical ballast characteristic curve. The curve by measuring the number of characteristic curves with different light lamp voltage and lamp power to obtain, or through an external approach with a lamp, the discharge tube to the cold end temperature change lamp voltage and lamp power to get. When the power supply voltage changes, the characteristic curve is obtained a ballast. At rated supply voltage increases or decreases the impact on the electronic ballasts characteristic curve.