Steady state operation

LTI’s mercury xenon lamps are specifically designed for DC operation. The typical manufacturing tolerance on the lamp voltage is ±3 volts. During the life of the lamp, the voltage will rise as the cathode tip erodes slightly, which causes the arc gap to increase.

LTI’s mercury xenon short arc lamps are considered constant current lamps. This means the operating current is set for the lamp, and the voltage is established by the specific parameter of the lamp including mercury dose, arc gap, gas pressure, operating temperature, etc. The operating current range for each of LTI’s mercury xenon lamps is specified by model, however in general the current should not be run at less than 85% of the nominal or more than 110% of nominal.