lightman64
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Zero 88 Lighting Controls Rule!
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| what happens after a MV bulb greens out? does it get dimmer?
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« Last Edit: December 15, 2008, 07:54:22 PM by lightman64 »
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The future of street lighting is Induction, not nasty HPS lights or cr@ppy LED lights!
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Foxtronix
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Formerly "TiCoune66". Also known here as Vince.
 
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| A mercury vapor lamp generally gets dimmer and dimmer until it can't light anything! There are also a few cases of violent failures (explosion) of just stop to work suddenly, but such cases are very rare.
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Mr. Big
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Your forgetting an MV lamp has a very small chance to explode, an MH, has a 99% chance of exploding!  |
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Foxtronix
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Formerly "TiCoune66". Also known here as Vince.
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Rudy: That's what I said. Also we aren't talking about metal halide lamps..  |
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lightman64
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Zero 88 Lighting Controls Rule!
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| weird... the bulbs in my gym are MV and they just quit. (high bay lighting - installed in 1974 ; most fixtures have been converted to MH but some still MV) MH just quis too- not the ballast either
does anybody know whats going on??
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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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Foxtronix
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Formerly "TiCoune66". Also known here as Vince.
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| This is a system for shutting the lamp off at his end of life to prevent a eventual explosion. Also if lamp just quit there is 99.9% of chance that the high bay fixtures are MH since MV ones don't have a such system.
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« Last Edit: December 15, 2008, 08:07:44 PM by TiCoune66 »
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lightman64
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Zero 88 Lighting Controls Rule!
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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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lightman64
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Zero 88 Lighting Controls Rule!
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| it says that they are 750 watt MV bulbs on the breaker- but u probally are right
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The future of street lighting is Induction, not nasty HPS lights or cr@ppy LED lights!
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TudorWhiz
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if they are 750 watt MVs, there is a chance they were self ballasts! So they probably broke filaments and had no continuity? I have a lamp that is self ballasted and in 208 volts for usually gym lights. Here is a picture, this one is not mine but I have same one see here |
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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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lightman64
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| i checked and they aren't self ballast. they might not be 750 watt maybe less
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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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TudorWhiz
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| perhaps 250 watt? also they can just go out because commonly for MV, the starting probe would get conflicted with the bottom electrode OR no emitter on the probes....
one of the other common MV dying is sometimes they go on, sometimes they dont, while other days it will work....I see this often on streetlights, when some days it lights up and other days it doesn't...a good touch of the lamp will fire it up (static) or even better I use a BBQ ignitor!
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« Last Edit: December 18, 2008, 11:16:00 AM by TudorWhiz »
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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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lightman64
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Zero 88 Lighting Controls Rule!
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| well in another gym the fixtures are smaller but 400 watt. (MH though)
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The future of street lighting is Induction, not nasty HPS lights or cr@ppy LED lights!
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Foxtronix
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Formerly "TiCoune66". Also known here as Vince.
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| About the "750W MV" breaker: maybe the electrician that serviced it had absolutely NO idea of the wattage and the lamp type, so he wrote this. Also if they really look like mercury it's possible that they're mercs that run on MH ballast.
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lightman64
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| i think they are mercs that run on a MH ballast. the gym was built in 1974
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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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TudorWhiz
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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......
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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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