I know!
Light bulb threads are nearly as common as tyre threads.
Im looking to upgrade my front fog light H11's for something brighter to put a little more light on the road for these incoming dark nights. Im thinking upgraded bulbs dont last as long in headlights because they are used much more often and they might have a reasonable lifespan in fog light enviorment.
So whats the current best buy? Landrover - turning owners into mechanics since 1948

2014 Orkney grey Freelander SD4 GS.
2004 Zambezi silver Discovery 2 Td5 (Gone)
1963 Surf blue Morris Mini Minor Super de Luxe (my little toy)