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Glurp
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Topic # 245193 23-Jan-2019 11:01
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How do LED light bulbs burn out? Do they suddenly fail or gradually fade? How long should they last? Do they give indications that it is time for replacement?

 

 

 

 





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  Reply # 2166087 23-Jan-2019 11:15
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I've only had two fail. Both gave no indication of their pending failure.

 

I believe it's usually the electronics which fails, not the LED itself.

 

They should in theory last decades, but those which have failed have lasted only a few months. One was a Panasonic, replaced under warranty, and that and all similar bulbs have been installed for a few years without issue.


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  Reply # 2166091 23-Jan-2019 11:20
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In my experience with cheap ali-express ones they suddenly fail.

 

By failure I mean the produce very low or no light. And I have had no warning.

 

I've been moving to the Philips brand standard LED bulbs as they fail, and recently started slowing moving again to the hue bulbs (buying 1-2 each time they come on special).

 

Also I believe the Foodstuffs Value band is produced by Philips so they seem to be a good cheap bulb alternative.


 
 
 
 


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  Reply # 2166317 23-Jan-2019 14:38
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It can be either the LEDs themselves or the power supply circuit. And like all other electronic devices, low quality components combined with high operating temperatures means short lifespan.

In theory, the actual LEDs will last almost forever. But they need to be supplied by a constant current power supply. And not operated too close to their current and thermal limits.





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  Reply # 2166845 24-Jan-2019 11:58
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I noticed one of my old LED bulbs was dimmer than it used to be.  On closer inspection, it looked like the internal LEDs on one side had failed while the other side was still lit.  I threw the bulb out and replaced it.


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  Reply # 2166922 24-Jan-2019 12:49
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mcgavinp:

 

I noticed one of my old LED bulbs was dimmer than it used to be.  On closer inspection, it looked like the internal LEDs on one side had failed while the other side was still lit.  I threw the bulb out and replaced it.

 

 

This is the HUGE advantage with LED 'bulbs' rather than an LED fitting.

 

You can easily replace a bulb.

 

I know a few people that have had their old light fittings replaced with nice looking LED fittings (bulb and works all built into the fitting - not a replaceable bulb).

 

I have usually said - "have you got a couple of spares?" - The response is normally - "But they are supposed to last for 20 years".

 

Amazing how often one of those fancy fittings fail and how hard it might be to get a replacement.

 

LESSON: ALWAYS GET SOME SPARE FITTINGS.

 

 





Nothing is impossible for the man who doesn't have to do it himself - A. H. Weiler

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