photocell replacement

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Old 12-08-11, 05:05 PM
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photocell replacement

Do photoelectric switches "degrade" over time and need to be replaced? My outdoor lights connected to an ALR model TL-115 photoelectric switch stayed on most of the day until I replaced it with a new one same kind same model, and now controls the lights more correctly depending on the day/night light/darkness. I noticed there was a date stamped on the old photoelectric switch of 11/01 which I suppose means that's when it was manufactured.

Also, we have a couple of Intermatic K4021 model photocell switches on a few other outdoor circuits but they seem to keep the lights on during the day more than they should be also. I was thinking about replacing those switches with new K4021 models but was wondering if perhaps the ALR model TL-115 (or Intermatic equivalent model k4251)) would be a more reliable or better in some way choice of replacement.
 
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Old 12-08-11, 06:26 PM
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Photocells don't last forever. It could be it is degrading and is at death's door. Others will follow suit. Not sure which one would give better service, if at all.
 
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