OgreVorbis
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| Why does this not exist? I would think instead of going to metal halide, it would have been easier to use sodium and mercury together in more equal amounts to produce a much whiter light. Has anyone run a mercury and sodium right next to each other? Did it look good?
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sol
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| I've seen some gymnasiums that had dual fixtures, one being /DX mercury and the other HPS. Made pleasing light, although the most common configuration was /DX mercury and incandescent.
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Olav
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Hello OgreVorbis, some manufacturers have made this combinated types. In the 50s and 60s very popular lantern in Germany: "the chinese-hat" (Chinesenhut).  The picture above shows two mv-ballasts and two autoleak-transformers  Biggest version was made with 4 lamps mv 250W and 4 lamps lps 140W. Greetings from Hamburg Olav |
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Joe Maurath, Jr.
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"A secret to happiness is letting every situation be what it is, instead of what you think it should be, and then making the best of it."
Please refer to www.insulators.info where I periodically post many images of lights and insulators in the group's Picture Poster Gallery. Thank you.
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wide-lite 1000
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I saw a Wide-Lite brochure on eBay recently where they actually showed an installation of both MV and HPS used to light the exterior of a building . https://www.ebay.com/itm/264650627708 |
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Collector,Hoarder,Pack-rat! Clear mercury Rules!!
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joseph_125
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| I recall seeing an old brochure for those dual lamp highbays suggesting one be MV and the other be HPS as a cheap way to improve colour rendering. Even during the 70s, there was a suggestion to relamp 2x400w MV highbays with a lead-lag ballast to HPS on the lag side for the same reason.
Of interest, I believe Eye made a combined HPS and MH lamp with the arctubes in series for horticultural lighting.
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wide-lite 1000
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I've seen the dual tube lamps on LG before . Wide-lite did make a high bay with both HPS and MH lamps . https://www.scribd.com/document/468247208/Wide-Lite-IL-Dual-Lamp-Series-Bulletin-1986 |
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Collector,Hoarder,Pack-rat! Clear mercury Rules!!
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tolivac
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| With various types of metal halide lighting wouldn't think a "combo" light would be necessary.Eye still makes the combo HPS MH lamps.Still listed in their catalogs.Also with the "white" light HPS lamps from GE and Philips,Eye the mercury/HPS light wouldn't be required.
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Olav
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Hello OgreVorbis, here is another example from PHILIPS with combinated mv lamp and sox lamp, the type NVF N 625 and NVF N 625 :  Source: PHOZAGORA  Source: PHILIPS éclairage, barème 1969 - édition mars Greetings from Hamburg Olav |
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Joe Maurath, Jr.
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"A secret to happiness is letting every situation be what it is, instead of what you think it should be, and then making the best of it."
Please refer to www.insulators.info where I periodically post many images of lights and insulators in the group's Picture Poster Gallery. Thank you.
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dor123
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| The use of both MV and LPS in the same lantern, is to save energy by turning off the mercury lamp at midnight. If you want white light from this combination, than only HPS and MV.
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.
I only working with the international date format (dd.mm.yyyy).
I lives in Israel, which is a 220-240V, 50hz country.
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