HIGH-WATTAGE CERAMIC METAL HALIDE LAMP
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United States of America Patent
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Issued Date -
Nov 27, 2014
app pub date -
Nov 2, 2012
filing date -
Feb 28, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Aspects of the disclosure include a ceramic metal halide lamp in which two arc tubes are arranged electrically in series inside the same outer globe. By arranging the two arc tubes in such a way that light-emitting parts thereof do not overlap, decline in lifespan due to the heat of one arc tube causing the temperature of the other arc tube to increase and lighting failure due to an increase in lamp voltage do not occur. And by setting the distance from an electrode tip at a base side of the first arc tube to an electrode tip at a lamp-top side of the second arc tube to be equal to or less than 3.5 times the average inter-electrode distance of both arc tubes, a preferable distribution of light is implemented.
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