* bulbs with the UK-standard bayonet fitting in light sockets that are suspended from cables from the ceiling with lampshades -- these I don't think I've ever had fail on me yet
* 4.6W bulbs with a GU10 fitting in recessed spotlights -- these fail on me more frequently (perhaps every few years to every five years)
My assumption is that this is all down to the spotlight-fitting bulbs being in a confined space and getting a lot hotter. I use Philips bulbs in both cases.
* bulbs with the UK-standard bayonet fitting in light sockets that are suspended from cables from the ceiling with lampshades -- these I don't think I've ever had fail on me yet
* 4.6W bulbs with a GU10 fitting in recessed spotlights -- these fail on me more frequently (perhaps every few years to every five years)
My assumption is that this is all down to the spotlight-fitting bulbs being in a confined space and getting a lot hotter. I use Philips bulbs in both cases.