That's a good question Arnie; it really makes a fella think! :thumbup:
So, given that the headlights are on all the time the engine is running, I think that total hours of globe use is probably going to be a pretty big part of this 'globe life' thing, altho I suspect the frequency & number of on/off cycles plays a significant part in overall globe life too.... :dontknow:
Often, you'll be able to find an 'average' or 'expected' globe life in hours hidden somewhere in the specs for most reasonable/good quality globes; not quite so often for the cheaper offerings - and there is very likely an identifiable & measurable link between the number of miles you do on your Spyder to the number of hours your headlights are actually on.... only that link is probably going to be a little different for different riders. Someone who rides in a way that gives them a 'total ride time average speed' of saaay, 70 mph will probably get a better 'miles between headlight globe failures' than someone who rides in a way that makes their total ride time average speed come in closer to saaay 30 mph; simply because the faster average speed means
that rider will probably cover more miles in the same sorta time that the slower rider will need to cover less miles, and the globes
do have an expected life that's normally measured in hours of operation, even if that is also varied/impacted by how often you turn them on/off!
So really, and recognising that there's a risk some may feel I'm being just a little facetious (and I'd really hate for this reply to be seen as being completely facetious...

) I think the correct answer to your question with it's 5 choices is most likely gonna be -
YES! Absolutey!
But then, I generally just try to
Ryde More, Worry Less! ..... and change the light globes whenever they fail!

hyea: :thumbup: