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.

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.

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.

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.