Years ago, while attending ASU, (circa 1961...Frank Kush was ASU football coach) I was returning from Tucson to Tempe when my 1960 Triumph TR6C headlight bulb decided it had had enough. I rode for miles without anything but starlight...not something I recommend. However in those days, there was little traffic and few Arizona Highway Patrol so, I made it back to campus without incident. Fast forward...the current BMW motorcycle electrical system is very reliable and night time riding should not be a crap shoot like those days of Joe Lucas electrics and British motorcycles with positive ground systems. Either carry spare lamps or convert your headlight to HID and never have a headlamp burnout again. Don't forget the tail lamp...go LED and never be without rear end lighting again in your lifetime.