Bunnings at Hemel had a similar deal on old Homebase stock when in there yesterday - they had a 2 pack of their own brand of this size and fitting, for 50p. Not Osram, but maybe worth a visit as they had pallet loads of other bulbs there.
Decided to add two more under cabinet lights but only enough room to fit this size lamp bought two transformers to bring mains lighting to 12 volts to fit this type... https://www.amazon.co.uk/gp/product/B008DFSU7O/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
I'm not saying they won't last - I'm saying they'll flicker depending on the light fitting. obviously the pound shop ones aren't Osram.
That's Osram, right? :) 15 year life, right? lol
careful with LED lamps of these kind on strip lights with three or more sockets. LEDs will flicker like a strobe lamp. Halogen lamps of these fittings are three for a pound in Poundworld.