What is the output voltage of the HPS lamp?
In order to meet the requirements of the work performance of ballast lamp, lamp voltage in the 95 to 105% range arbitrarily changed, limit line intersection lighting voltage should be in power within the limits, and in the entire range of bias voltage in the bulb remains in its power deviation. Ideal hydraulic pressure water lamp should be: when the bulb voltage rise, the highest deviation limit point, the bulb power drops
In the later period of the bulb life, the power and the luminous efficiency of the bulb decrease sharply, and the service life of the bulb is also affected. The influence of the ballast on the power of the bulb is too poor, and the ballast performance is very poor, and is not suitable for adoption.
Take 250W high pressure sodium lamp as an example: the curve A indicates that during the whole life of the high pressure sodium lamp, the working voltage rises, the power of the bulb changes little, and the ballast has good performance. The curve B indicates that the HPS is overloaded during most working hours, and the ballast is poor in performance. The curve C indicates that in the early stage of the life of high pressure sodium lamp, the working voltage rises, the power of the bulb rises rapidly, and the service life of the bulb is shortened
