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I replaced a 50W halogen gu10 bulb in a ceiling fixture on an AFCI-protected circuit with a 5W dimmable LED bulb, and it trips the breaker after a few seconds (even after reseating the bulb). Another brand of non-dimmable LED bulb worked fine. (light is not on a dimmer.) Do people think the problem is a defective bulb, or nuisance tripping?

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All GU10 I know is 110/120v so 5W @ 110V is ~.05 Amp. So 1/20 Amp tripping a 15? Amp breaker is a problem. –  Jason Aug 7 '13 at 21:59
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