How long can a metal halide lamp last

  • Thread starter Tregg Smith
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In summary, the owner of a property claims that an outdoor light, either mercury or metal halide, has been burning constantly since at least 1996 due to a malfunctioning photo switch. Two other nearby lights with functioning switches have burned out. Metal halides have an average lifespan of 20,000+ hours and are not meant to be frequently turned on and off. A local contractor also mentioned that mercury vapor lamps can last forever but will dim over time, and not being turned on and off likely contributed to the longevity of the light.
  • #1
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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  • #2
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.
 
  • #3
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.
 

1. How long does a metal halide lamp typically last?

A metal halide lamp can last anywhere from 6,000 to 15,000 hours, depending on the wattage and quality of the lamp. This translates to approximately 2-3 years of usage for a typical household.

2. What factors affect the lifespan of a metal halide lamp?

The main factors that affect the lifespan of a metal halide lamp are the wattage, quality of the lamp, and frequency of use. Higher wattage lamps tend to have a shorter lifespan, and lamps of lower quality may burn out more quickly. Frequent on and off cycles can also shorten the lifespan of a metal halide lamp.

3. Can the lifespan of a metal halide lamp be extended?

Yes, there are a few ways to extend the lifespan of a metal halide lamp. Using a lower wattage lamp, keeping the lamp on for longer periods of time, and using a high-quality lamp can all help to prolong the lifespan. It is also important to regularly clean and maintain the lamp to ensure optimal performance.

4. How do you know when a metal halide lamp needs to be replaced?

There are a few signs that indicate a metal halide lamp needs to be replaced. These include a decrease in light output, flickering or dimming of the light, and discoloration of the lamp. If you notice any of these signs, it is important to replace the lamp as soon as possible to avoid potential hazards.

5. Are there any safety precautions to take when handling a metal halide lamp?

Yes, there are a few safety precautions to keep in mind when handling a metal halide lamp. Make sure to turn off the power and allow the lamp to cool down before handling it. Also, wear gloves to avoid any skin contact with the lamp. It is also important to dispose of the lamp properly as it contains hazardous materials.

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