After the nth tail light failure last night I looked on my spreadsheet to see how long the previous set lasted (I replaced both even though only one was blown, the remaining working bulb looked knackered as well anyway).
Mileage in bold. Four months! This is crazy, I'm sick of it. I use Bosch 245S. Halfords' bulbs failed even quicker (only tried them once, that was enough). The factory Osrams lasted three years but can't find anywhere that sells Osram - dealers just sell generic stuff and say they're all the same. These lights are on no more than 10 minutes a day, as I work not far away and only use them on the way home, maybe in the morning if visibility is poor.7-Aug-2005 31741 Nearside tail lamp
10-Aug-2005 31831 Offside tail lamp
18-Jan-2006 35426 Offside tail lamp - replaced both