Metal Halide Sources

  • J. H. Ingold
Part of the NATO ASI Series book series (ASIB, volume 149)


The words “metal halide source” are used to describe a family of discharge light sources composed of mercury vapor at a partial pressure of several atmospheres and one or more metal halide compounds at partial pressures generally between 0.1 torr and 10 torr. The main difference between metal halide sources and other discharge sources is that metal halide sources generally have better color-rendering properties. The reason for having better color is that the spectrum of emitted radiation is more balanced, as opposed to the unbalanced spectrum of the high pressure mercury discharge which has no red components. The balanced spectrum is produced by line and band radiation from the metal halides, which may be dissociated in the hot core of the discharge.


Energy Balance Equation Local Thermodynamic Equilibrium Metal Halide Ambipolar Diffusion Mercury Atom 
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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • J. H. Ingold
    • 1
  1. 1.General Electric CompanyLighting Business GroupClevelandUSA

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