Can a faulty GU10 bulb trip RCD?
It takes a lot to trip an RCD.
A GU10 socket does not deliver earth to the bulb, so I don't see what possible manipulation a bulb could do to trip an RCD even if it was purpose-designed to do that.
So I consider that &quot;highly improbable&quot;.
Especially since the RCD trip is intermittent, and that is not how a faulty bulb would trip (even if it had access to earth).