lightman64
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Zero 88 Lighting Controls Rule!
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they dont make mercs that run on MH ballast
do you mean ballasts that runs both MV and MH? If so they would be both same wattage......
that might be what it is......
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The future of street lighting is Induction, not nasty HPS lights or cr@ppy LED lights! Preheat CFL's should make a comeback!
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Mercury Man
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MVs can be run on an MH ballast if the wattage is correct, yes? Also, I have seen MH bulbs get greened out early in life, this can happen supposedly due to too much MH salts in the arc tube. I used to work in a store that had 20 watt MH floodlight fixtures and an entire batch of bulbs crapped out within 3 months because of this.
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TudorWhiz
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MH lamps should NOT be run on MV ONLY ballasts....It will cause quicker blackening.....Jeremiah may have more information on this since he was showing me GE MH lamps that was used in MV low bay fixtures....
MV CAN be run on MH ballast if the wattage is the same.....but that is an exception on 100 watt or lower.....you can't do it on 100 watt or lower....only 175 watt and higher......
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For pictures of my streetlight collection and other streetlight pictures with some various pictures that are not in this website, please visit http://www.galleryoflights.org/ under GullWhiz
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Medved
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MH lamps should NOT be run on MV ONLY ballasts....It will cause quicker blackening.....Jeremiah may have more information on this since he was showing me GE MH lamps that was used in MV low bay fixtures....
MV CAN be run on MH ballast if the wattage is the same.....but that is an exception on 100 watt or lower.....you can't do it on 100 watt or lower....only 175 watt and higher......
And only in US. In EU most MH's (at least in range 70..400W) are designed for SON ballasts of the same wattage rating, only higher voltage ignitor is recommended.
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No more selfballasted c***
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TudorWhiz
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But it may have harder time starting up causing moe sputtering due to lower OCV in MV ballasts....that's why MH designed ballasts have higher OCV than older MV ballasts.....
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bluelights
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Strange, I just rarely see a "greened out" mercury bulb, it seems that they will burn with sky-blue color at the end of their lives here... Maybe this applies only to clear bulbs or just US ones? ![Grin ;D](/Smileys/default/grin.gif)
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"The orange cloud looks like floating nuclear waste." Save the mercury lamp
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Medved
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Strange, I just rarely see a "greened out" mercury bulb, it seems that they will burn with sky-blue color at the end of their lives here... Maybe this applies only to clear bulbs or just US ones? ![Grin ;D](/Smileys/default/grin.gif)
Lamps with older emitter composition "blacken" - metals get deposited to the quartz wall and this block both the UV and blue, so phosphor is not anymore excited, so do not generate the red, so the remaining light is yellow and green mercury lines. And those are attenuated as well, but not as much. Newer composition causes deposit appearing white, what is still translucent to blue, but not anymore to UV. When UV disappear, the phosphor do not add the red component, so the color appearance gets bluish.
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No more selfballasted c***
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TudorWhiz
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Bluish coloring.....sounds a lot like a /W type phosphor.....we now use /DX we had /W which was one of my favorites!
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For pictures of my streetlight collection and other streetlight pictures with some various pictures that are not in this website, please visit http://www.galleryoflights.org/ under GullWhiz
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don93s
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I've seen /DX lamps turn greenish, but more rarely. Mainly, the horrible Philips MV lamps of the late 90's-early 2000's.
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icefoglights
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ITT Low Pressure Sodium NEMA
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I've seen many clear Cooper/Regent 175 watt lamps turn green. It's quite common around here.
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01010010 01101111 01100010 01100101 01110010 01110100
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Foxtronix
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Formerly "TiCoune66". Also known here as Vince.
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Mainly, the horrible Philips MV lamps of the late 90's-early 2000's.
Here Philips lamps are installed in the very few mercury streetlights that are still serviced, and one of them is badly greened out.
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