I had several blow/fail at a customers house.
Wired their kitchen extension with 8 downlights and fitted GU10 LED lamps, the ones with 20 ish surface mount LED's.
After about a month i was called back due to the RCD tripping every time the kitchen lights were turned on.
Over the next 6 months i went back several times so all the lamps had been replaced at least once(luckily i had them all replaced under warranty from the supplier but it still cost me a lot in time to keep replacing them and getting them exchanged).
I finally gave in and replaced all the lamps with a different brand and not a single failure since.
The ones i removed were used at my parents house and worked fine there so i guess the supply must have been a bit high for them at the customers house (approaching 250v at times).
I looked at a couple of the failed lamps and it was the power board that had blown, when i hooked up the LED's directly to a 12v supply they worked fine.
Steve
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