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Join Date: Jan 2017
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I used to sell specialty 'brighter' bulbs like that and no way do they last as long as the OEM specced bulb commonly. They give you more light output by making the filament thinner to glow brighter, it's only common sense.
As well, any looseness at the 'at bulb connector' or the outside weatherproof further out harness connector can do that, the outside one if present gets corrosion and both being even the slightest loose then allow sporadic current surges that then kill the bulbs even if they are little enough you can't see any difference in the output of light. I've seen alternator problems with bad power connections do it too, but that commonly involves the whole car blowing them.
If the bulbs ground right close to headlight then the ground point being less than stellar does the same.
If halogen the bulb glass must be kept clean like said, even human finger oil can fail the bulb but that is a glass issue not the internal filament.
I commonly have the wifie hold onto 'pre-approved' but not valid credit cards I will never use to make connector cleaning tools of various widths, you cut them back to expose say 1/16" wide blade maybe 1/2" long and then cut like 600 sandpaper the same but more than double length so you can wrap it around the card tab and hold it in place with fingers, then you have a female connector cleaning tool that easily inserts in the females of the pins to sand the contact points down to clean them. More u-fold cut sandpaper and folded double along with very small hobby needlenose pliers like found at Harbor Freight to clean the male flat pins. Then use ANY grease (I use wheel bearing and general use type) as long as it is not metal based to short out to coat the pin connections for more weatherproofing. It doesn't have to be the expensive dielectric stuff at all, which I usually consider a scam except only in a very few locations.
Done correctly the newly cleaned pin connectors will last for years.
If any headlight assembly mounting is loose to shake then of course the bulb will not last there. Proper damping is bulb life.
Last edited by amc49; 06-23-2017 at 06:19 PM.