[Yellow_Festiva]

I think you should just leave them till they blow.

Worst case scenario, one goes... the light from the other will be enough to get you home.

Keeping a spare is great, but will you be the one to be changing it on the side of the road at night? The Focus headlights were a 45 min job the first time as it involved a lot of trial and error (mostly error) and when the other side went I could do a change in 15 minutes. Would not do it till I was home and in day light.

Also, not sure if keeping a globe in the car (glove box) would be advised as you may have a lot of loose junk sliging around in there and the constant jarring and sliding may effect its shelf life.

Buy a set of spares, pop the bonnet one morning and teach yourself to access the globe, remove it, put it back taking note of what order you clip / unclip stuff and then you will be a pro when you need to do it for certain. The head light in the Focus needs to be totally removed, not sure in the Fiesta.