Cabin light fault

[PabloPicasso]

I have a number of LED cabin lights sharing a circuit, switching on/off with their own individual switch, as is typical.

One started to dim and flicker, soon followed by others. If I switch off the circuit and leave it for a few minutes most work again but now a second light is beginning to 'catch' the dim/flicker bug.

What's going in?

 

[Graham376]

Have you been using them with engine or charger on? Some can't cope with higher than rated voltage.

 

[PabloPicasso]

With engine on, but i have no other charger.

 

[Graham376]

I had a couple of led lights some years ago which had come from a domestic installation, fed from a small power supply, 240v in 12v out. They didn't last long. The ones I have now have regulation built in and rated for I think 10 - 30 volts and no problems.

 

[littledancersadhu]

Put the origional tungsten lamps in and verify they are working correctly.
If so, compare the dimensions of the fitting/lugs, chances are, they are slightly smaller and start arcing after a while.
Or you could have cheap led's from china.

 

[PaulRainbow]

As per some comments above, some cheap LEDs don't like anything much above rated voltage. A DC-DC convertor stops any problems like that.