Obtaining Fixtures > Wanted Requests
Looking for vintage metal-halide lamps with Thallium Indium
lights*plus:
It's a long shot, but it's the only place to ask for something like this (here & maybe lighting-gallery.net).
I need a metal-halide lamp of any wattage with the old Thallium-Indium-Sodium formulation instead of the typical Scandium-Mercury-Sodium. Made from about 1960 to 1980? Purpose is to accurately record their unique spectrum.
I actually saw a pair of flood lights on ground lighting a company's sign. Identified & photographed on film, with a grating, circa 1990.
Any advice on how to search on ebay also appreciated.
Mike:
Hmm wow i didn't know MH was around in the 60s. My 1977 GE street light catalog lists the M-400A and M-1000 available with 400W and 1000W MH, respectively, but i don't think MH really ever caught on until the 90s when it started appearing in parking lots and indoor applications like gymnasiums and warehouses. The oldest MH lamps I have is a lot of three Sylvanias from 2000. :-\
lights*plus:
Yes, didn't catch-on until the 1990's because they were extrememly expensive.
The success of early Television broadcasts of night sport events (late 1960's) was due to the better color charactestics of metal-halide lamps.
It's remarkable how lighting technology has progressed. Virtually all major ballpark lights from about the mid 1960's were metal-halides. And some had unusual formulations such as tin-iodide with mercury and sodium.
lights*plus:
Here's a GE brochure from 1980 that included some I-Line retrofit lamps - MV to MH.
http://www.scribd.com/doc/82035387/GE-Multi-Vapor-Brochure-1980
lights*plus:
2000W lamp with Indium. A Czechoslavakian Tesla lamp:
http://www.youtube.com/watch?v=WQ1GaQEBg14
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