How long can a metal halide lamp last

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SUMMARY

Metal halide lamps typically have an average lifespan of over 20,000 hours. Continuous operation, as seen in a lamp that has been burning since 1996, significantly contributes to their longevity. The owner reported that the photo switch is malfunctioning, preventing the lamp from shutting down, which aligns with the understanding that metal halides do not favor frequent restarts. Additionally, while mercury vapor lamps are noted for their extended lifespan, they also experience dimming over time.

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  • Understanding of metal halide lamp technology
  • Knowledge of lamp lifespan metrics
  • Familiarity with photo switches and their function
  • Awareness of the differences between metal halide and mercury vapor lamps
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  • Research the operational characteristics of metal halide lamps
  • Investigate the effects of continuous operation on lamp lifespan
  • Learn about the maintenance and troubleshooting of photo switches
  • Explore the differences in performance and longevity between metal halide and mercury vapor lamps
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Outdoor lighting professionals, electrical engineers, and anyone involved in the maintenance or installation of metal halide and mercury vapor lighting systems.

Tregg Smith
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I'm doing a story for our paper on this outdoor must be mercury or metal halide light that's been burning constantly at least since 1996. So says the owner who took over the property then. He says the photo switch isn't working so it never shuts down. And-there are two others nearby with good switches that are burned out. It does look a little dim.
 
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Metal halides have an average lifespan of 20,000+ hours. They are meant to be turned on a left on and do not like to be restarted. 1996 seems like a long time, but I guess anything is possible. The fact that its been continuously burning is one major factor that would lead to its longevity.
 
A local contractor told me mercury vapor lamps will last forever but they do dim over time. and yes no on/off cycles likely added to it's longevity.
 

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