| 摘要 |
An electrodeless bulb (1) has a hollow quartz tube (2), with a solid stem (3) extending from one end and a short hollow tip (4) extending from the other end. The hollow interior (5) of the tube extends into the tip (4) with the same diameter as in the tube (2), but the wall thickness (6) of the tip is reduced from that (7) of the tube (2). The bulb is charged with an amount (8) of indium bromide and traces of other metal halides to adjust light spectrum and a filling of xenon gas.
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