Abstract
We investigated the start characteristics (decreasing the breakdown voltage and increasing the luminous flux during run-up time) of mercury-free metal halide discharge lamps. Breakdown voltage of mercury-free metal halide discharge lamp could be reduced if the gas in the outer envelope is Xe or Xe/Ne. Adding indium iodide and supplying higher electrical power could increase luminous flux during run-up time. The run-up requirements in ECE regulation No. 99 can be achieved by supplying 90W of power to the lamp during run-up time.
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