Can't say I've had a problem with that in the past, except when the headlamp mounting rubbers needed replaced and vibes were being viciously transmitted to the headlamp shell. Apart from that, all my H4 halogen bulbs have been car sourced, and have lasted well.For the headlight bulbs you should purchase a motorcycle bulb. Apparently the automotive bulbs are not made the same. I recently read somewhere that they are not made to withstand the vibration and shock that a motorcycle endures. I guess you pay for what you get.
Otoh, I tend to look askance at many of the really cheap H4 bulbs available now and wonder how long they'd last anyway - I think it's fair to say that in real terms I was paying much more per bulb back then than many people will be spending now.
So, I'm kind of agreeing with you - pay more and get a decent one that will last.
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