Good advice from Simon, the only flaw is that GU10's do not contain Ballotoni fuses unfortunately, however his comments about Osram are valid, these are the best lamps you buy.
I would also consider getting the lighting circuit looked at, a properly designed and installed circuit should not usually suffer this problem, they can, but rarely.
Another thread where I've found a notification of a post which has since been removed.
Now forgive me if I'm being dim, or insensitive, but I can't see anything here which could have caused someone to react with an "inappropriate" post - ¿que pasa?
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