Hi Stuart

I have had nothing to do with LEDs, and have not fathomed your riddle. Could you expand on a little please.

Some have reported problems with electrical interference, cured with capacitors as for radio suppression.

Location: Auckland, NZ

My Opal and Rosengart run entirely on LED lighting, ok except the ignition warning lamp. I have earthed everything back directly to the battery.

Location: Oakley hants

Mr RP had Lucas 'D' lamps at the rear which have been converted with LED lighting boards by Peter at dynamoregulatorconversions.com and I'm very pleased with them. The give red tail/stop plus white number plate illumination.

For some reason the headlamps have Marchal innards and no suitable LED 3 pin 21d dipping bulbs are yet available. I have considered changing the reflectors but I don't do much night driving anyway so have retained the normal bulbs & festoon sidelights for the time being.

Location: Gard, France 30960. Used to be Languedoc-Roussillon but now it's Occitanie

Sorry Bob, I'm just reporting what happened with our car. If I fully understood what was going on I'm sure it wouldn't have taken two days to sort it out. It would seem the LEDs were finding two earths, one intended and the other through the incandescent main beam warning light bulb. I understand that LEDs are polarity sensitive.

Location: Teignmouth