High pressure gas discharge lamp

摘要

The gas discharge tube proper, filled pref. with sodium vapour or halogen/metal vapour, is surrounded by a jacket of thermally strong material e.g. quartz glass, and has insulated end-caps which grip the flat centre sections of I shaped pinches at the ends of the jacket. Layers of material or additives to the glass, reflect or attenuate I.R. and/or U.V. radiation. The ratio of the I.