About 5 years ago, my wife's Focus kept blowing bulbs and I was desperate to find out what was going wrong because bulb-changing was an hour-long knuckle-skinning experience that had to be carried out with the skill of a a gynaecologist. I had been using cheap bulbs and I was advised, on 'the other place', to only use decent branded bulbs. 'Ring', by the way, are considered as cheapies and not good enough.
I switched to Philips/Osram or OEM supplied by a main dealer and none of those replacements have blown since. The extra cost is EASILY justified by the convenience of reliability. By the way, I'm only talking about 'normal' bulbs - not the super-duper devices designed to dazzle other road-users.
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