LED Replacement Bulb Issue

[Darren Nelson]

Hi,
I have just bought some LED replacement bulbs for our kitchen lights. I have attached 2 images for reference. I was told the replacement LEd would simply replace the standard E14 SES halogen bulbs. The problem we have is that when we have put in 3 new LED bulbs into the fitting, only the middle one works. Swapping the bulbs around doesn't change anything, we just have the middle one lit. I have then put in halogen bulbs in the outer 2 lights along with the middle LED and all 3 light up. I have even swapped the outer ones for a different LED light ( an R50 from the bathroom ) and this just flashes. There is no transformer in the actual fitting. And works fine with 3 standard halogen bulbs. Just thought I was doing the right thing trying to save electricity....very frustrating. Any ideas?

 

[telectrix]

you're applying 240V A.C. the lamp's built in driver deals with the rectification and step down. that's why drivers go bang sometimes.

 

[Rpa07]

Saying that Tel - obviously having a brain fart moment, as a GU10 LED could go in either way so polarity not an issue there. 12v DC, it would be I guess. Thanks

 

[telectrix]

Saying that Tel - obviously having a brain fart moment, as a GU10 LED could go in either way so polarity not an issue there. 12v DC, it would be I guess. Thanks

 

[Darren Nelson]

A bit confused with the replies. Sorry. So to re-cap on my issue, any of the newly purchased LEDs will only work in the central fitting. We have 2 of these lights in the kitchen and it happens with both. An LED in the central one lights up as does any halogen in the outers. If you say the wires might need swapping which would then supposedly mean the 2 outer light works but not the middle, then how do I get all 3 working? I'm fairly sure the wires in and out of the terminal block are correctly wired but didn't know that a normal halogen will work if the L & N are mixed up.
There is no transformer and someone mentioned a driver, where would that be? In the new LED bulb itself?
Sorry if daft questions!

 

[telectrix]

the driver is incorporated in the LED bulb. polarity is not an issue. the best guess i can make is that the new LED bulbs are bottoming out in the fitting before the centre contact makes. try bending the centre contact in the fitting up a bit ( isolate supply first ).

 

[Wilko]

... If you say the wires might need swapping which would then supposedly mean the 2 outer light works but not the middle, then how do I get all 3 working? I'm fairly sure the wires in and out of the terminal block are correctly wired but didn't know that a normal halogen will work if the L & N are mixed up...

Hi - that was me suggested that. I was wrong, it will make no difference as the LED and halogen lamps you have are 230V AC units and are not polarity sensitive. @telectrix has the answer, I think.

 

[dmxtothemax]

I have seen a simular problem but with e28's
But it's the same issue I believe
the problem is that on the LED lamps the center contact is NOT sitting high enough to make good contact with the center contact of the lamp base.
You can sometimes fix this by prying the center contact in the base upwards slightly.
If not a dab of solder on the center contact of the lamp also works.