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Originally Posted by rtb001
regarding getting replacement halogens for the low-beams. Is there any reason why the aftermarket bulbs have such abysmal lifetime?
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The coating they use on the bulb to make them appear whiter also causes them to run hotter. The hotter an element is the shorter the lifespan.
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Sure they are a bit brighter
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They aren't. That same coating also reduces the lumens output. Whiter, yes, but whiter and brighter aren't the same thing. Knowing that I wanted it brighter is why I took the time to research the lumens output on all of the H7 options. The Osram Rallye is the only H7 with significantly (50%) higher lumens output than stock.