Juris Macropus, or Frugality vs Frustration

[Citroënbender]

It behooves me to replace two failed wedge globes in the 147's central brake light array.

I have sufficient new Narva units to replace them all - even those which appear to be in perfect order. Based on experiences of others - which I hope to guide my choices here - should I only topically repair, or is it "smarter" to do all at once?

[bazzbazz]

Well as we all know, after pulling it out and just replacing two faulty units, then replacing it all, during the following week at least one of the other old bulbs will pop. But then you already knew this, so I assume you were just needing someone to remind you of such? 

[Citroënbender]

Nah, I don't see 147s day in, day out like you do - and haven't heard anything to the effect of whether the bulbs are highly stressed or seldom blow.

Hmm... Might just do the lot then. 

[poohbah]

You both seem to forgetting the other Alfa maxim: If it ain't broke don't touch it ...

[bazzbazz]

Oh yeah, that always works out well . . . . cambelts . . . . water pumps . . . . . V6 fuel rails  . . . . 

[poohbah]

Mandated maintenance aside obviously...

[Citroënbender]

I'm happy to replace the lot, if anyone wants a used globe that "ran when parked" they can have it...