Why did this LED die ?

trevorbayliss · 25 Aug 2020

I put a new bathroom light in during May and the thing has died 3 months later. I have gotten my money back, but i was wondering why it broke.

I think it is connected to something my tenant did. They changed the light pendant in the bedroom and the guy didnt wire the 2 neutrals together.

About 5 days later the bath light stopped working normally and instead was on all the time with a very faint glow.

I rechecked the bedroom pendant and corrected the issue and the bath light came on straight away. About 3 weeks later the light has now died completely.

Has this change in wiring caused the driver to be stressed ? Or is it something else. It was £12.50 on ebay so cheap. Could it be just a rubbish product ?

333rocky333 · 25 Aug 2020

sounds like your house lights were accidentally put in series therefore the normal 240 volt got reduced to about 120 volt across the Driver, this proberly done it in,

trevorbayliss · 25 Aug 2020

Ok thanks. Do you know if a new driver could be swapped in and so making it work again ?

333rocky333 · 25 Aug 2020

Hard to tell, that looks like a Constant current driver, you may struggle to get one with the same power and ma rating.
With series leds like that a failure on 1 can knock out the whole string, like the old xmas lights.
So its 50/50 Driver or Led array
You could test the Driver though, but be carefull they can output higher voltages than you might expect

333rocky333 · 25 Aug 2020

Looking at the pic theres a lot of exposed solder joints you can measure the voltage at, is it a UK fitting i am surprised thats allowed and possibly not safe in a Bathroom anyway

SUNRAY · 25 Aug 2020

trevorbayliss said:
Ok thanks. Do you know if a new driver could be swapped in and so making it work again ?

My experience of these is it's one of the LEDs thats failed. do you have a multimeter so that next time you can measure the voltage coming out of thedriver?

trevorbayliss · 25 Aug 2020

I dont have any of that stuff. It was a chinese import sale on ebay. Only £12.50. It was IP rated for bathrooms.

Looks like its going in the bin.

333rocky333 · 25 Aug 2020

trevorbayliss said:
I dont have any of that stuff. It was a chinese import sale on ebay. Only £12.50. It was IP rated for bathrooms.

Looks like its going in the bin.

You mention tenant, i wouldnt chance it, if there is 90 volt exposed with the cover off

SUNRAY · 26 Aug 2020

333rocky333 said:
You mention tenant, i wouldnt chance it, if there is 90 volt exposed with the cover off

What would you suggest?

My experience of this sort of fitting is they all have similar construction techniques

delmel · 26 Aug 2020

Not even a name on it, doubt its ever passed any testing for the UK market. I suspect nothing on the actual fitting either

AndyPRK · 26 Aug 2020

I purchased a Sylvania one from screwfix for about £15. Very bright for its size.

6W 5652H

ericmark · 26 Aug 2020

It would need around 50 - 60 volt at 230 mA and my hunts could not find one, it would cost around £10 and if any single LED has blown it will not work, not worth messing with, buy whole new fitting.

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Why did this LED die ?

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