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spectrum of HID lamp

Discussion in 'Lighting' started by William, Jan 19, 2006.

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  1. William

    William Guest

    Dear All:

    I need your instruction to find out the typical spectrum of HID lamp
    (automobile headlight). Please kindly instruct.

    Thanks,

    William
     
  2. A member of this group has posted spectral curves of many
    lamps on his web site. See:

    http://ioannis.virtualcomposer2000.com/spectroscope/index.html

    --
    Vic Roberts
    http://www.RobertsResearchInc.com
    To reply via e-mail:
    replace xxx with vdr in the Reply to: address
    or use e-mail address listed at the Web site.

    This information is provided for educational purposes only.
    It may not be used in any publication or posted on any Web
    site without written permission.
     
  3. The spectrum may vary between bulb manufacturer and type (D1S, D2S, D3S,
    D4S, D1R, D2R, D3R, D4R), and whether you're looking at just the bulb
    light or at the light coming from a headlamp (through potentially
    colored lenses and off potentially colored reflectors).

    That said, if you want to know the spectrum then you should either
    measure it or contact a manufacturer or possibly a supplier and ask for it.
     
  4. Here's the newest burner (D4 Hg-free). It contains more blue than the
    older D1/D2 lamps:

    http://www.nuconverter.de/assets/d4sbei35w.gif
     
  5. D3x and D4x are by definition Hg-free. Of course, I am trusting the site I
    found to report the DUT accurately, which they may not have done.
     
  6. Since there are so many lines from scandium and the other
    metals used to augment the sodium spectrum in metal halide
    lamps, some of these lines could be easily mistaken for Hg.
    Or -perhaps these lamps are not completely Hg-free. The
    mercury may be reduced enough that the lamps are no longer
    classified as hazardous waste, but that does not mean zero
    mercury.

    --
    Vic Roberts
    http://www.RobertsResearchInc.com
    To reply via e-mail:
    replace xxx with vdr in the Reply to: address
    or use e-mail address listed at the Web site.

    This information is provided for educational purposes only.
    It may not be used in any publication or posted on any Web
    site without written permission.
     
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