| 摘要 |
A high-pressure mercury vapor iodide discharge lamp comprising an envelope forming a discharge space having a wall loading between 10 and 100 watts per sq. cm during operation of the lamp. The discharge space contains a gaseous filling comprising a rage gas, a quantity of mercury between 0.5 to 40 mg. per cubic cm. of the content of the discharge space, a quantity of iodine, a quantity of sodium and lithium to form sodium iodide lithium iodide, such that unevaporated lithium iodide and sodium iodide are present during operation of the lamp, a quantity of thallium between 0 to 15 percent by weight of the quantity of mercury, and a quantity of titanium between 0.01 and 5 percent by weight of the quantity of mercury. The quantity of iodine is limited to not more than twice the minimum amount required to bind the lithium, sodium, thallium and titanium to their respective iodides.
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