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Ruptured Philips 50w CDM

Ruptured Philips 50w CDM

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First time finding a ceramic metal halide lamp that actually exploded at EOL, this lamp was on the the correct gear running base up in a recessed can. Given how the two arctube parts are far apart, this mustve exploded while operating (pressurized) rather than just cracking in half as it cooled down.

20190909_203700 (1).jpg 20190314_215620.jpg 20190325_170032.jpg 20190313_180300.jpg

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Filename:20190314_215620.jpg
Album name:BlueHalide / New album
Keywords:Lamps
File Size:388 KB
Date added:Apr 01, 2019
Dimensions:2464 x 1848 pixels
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Date Time:2019:03:14 21:56:20
DateTime Original:2019:03:14 21:56:20
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BlueHalide
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Apr 01, 2019 at 08:30 PM Author: BlueHalide
Btw, this does not indicate a poor quality lamp, all of the lamps replaced (including this one) were at nearly twice their rated life and original to the installation
fluorescent lover 40
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Lights are awesome! :)


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Apr 01, 2019 at 08:34 PM Author: fluorescent lover 40
September 2001.

Power provider: Southern California Edison (SCE)

-Date decoder of some US lamps 1960-present.
-Switch and receptacle collector.
-I'll save any vintage lamp! Smiley

Lumex120
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105555521242365640724 UCM30tBQDUECOV6VeG5W87Vg zfarmadillo
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Apr 01, 2019 at 08:49 PM Author: Lumex120
It's possible this lamp operated from around the time 9/11 happened to today.. kind of weird/sad to think about all that happened while this lamp was in use.

Any machine is a smoke machine if you operate it wrong enough.

BlueHalide
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Apr 02, 2019 at 10:48 AM Author: BlueHalide
These lamps were installed in 2009 when the place was built, the date code of 2001 means some electrical supply house was sitting on these lamps for 8 years, which is really long considering CHM became popular in the early to mid 2000's. Anyway, these lamps did run 8-9hrs a day since 2009, which yields something like 32,000 hours which is excellent given the rated life of these low wattage CMH is typically 18-20K Hrs.
d3anio97
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Enginerding bright things since 2011


ATL TheSOXMania
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Apr 02, 2019 at 11:01 AM Author: d3anio97
I'm impressed that this lamp didn't rupture and nuke the outer envelope. Those alumina arc tubes are super dense and break regular glass super easy!!

What if I told you you could save 100% of your street lighting budget? Don't believe me? Buy an LED street light and run it for a week. the results will leave you in awe. (Aaaaaaand maybe wondering why you swapped that 70w SON)

d3anio97
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ATL TheSOXMania
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Apr 02, 2019 at 11:20 AM Author: d3anio97

These lamps were installed in 2009 when the place was built, the date code of 2001 means some electrical supply house was sitting on these lamps for 8 years, which is really long considering CHM became popular in the early to mid 2000's. Anyway, these lamps did run 8-9hrs a day since 2009, which yields something like 32,000 hours which is excellent given the rated life of these low wattage CMH is typically 18-20K Hrs.

Yeah. That's pretty damn impressive but not too far out of the realms of possibility as arc lamps aren't rated like incandescent lamps. They're rated to the point a large number of lamps would exhibit signs of potential catastrophic failure, such as wild variations in colour, cyclic ignition and run-up, large losses in light output or even, in the case of CDM and HPS lamps, arc tube leakage due to thermal cycle induced glue failure. with higher pressure lamps, they generally explode like the one in the picture if they have been subject to thermal cycling after being run long past their usable life. Lamps which are subject to significantly more cycles will be more likely to fail either close to or at, maybe even before their rated lifespan. Lamps which are run for extended time periods and only periodically switched off as per manufacturer recommendation can last north of their rated usable life.

What if I told you you could save 100% of your street lighting budget? Don't believe me? Buy an LED street light and run it for a week. the results will leave you in awe. (Aaaaaaand maybe wondering why you swapped that 70w SON)

BlueHalide
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Apr 03, 2019 at 09:33 PM Author: BlueHalide
CHM lamps, from my personal experience in the field, maintain their color temperature very well over life, and therefore are often left running well beyond their rated life. The is not the case with quartz lamps, where it becomes super obvious when a lamp is nearing EOL, and therefore relampings are generally made well before catastrophic failure to restore the proper light color and output.

I know of one dusk to dawn outdoor CHM installation in which the lamps are easily 8 years old, the majority of which are still producing the correct warm white color, but with reduced intensity. These lamps are easily into the upper 30K/lower 40K hours.
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