A little row of five recessed spots in the kitchen ceiling, above the work surface.
Two of the halogens have failed. First time I've had to replace any of 'em since we moved in.
There's a cupboard full of various CFL and LED GU10-equivs. Do any of 'em bloody fit? No, of course they don't. The CFLs are laughably huge, total non-starter. But the LEDs look like they should... Oh, wait a second... They curve slightly out from the edge, so the sodding retaining clip won't _quite_ fit.
Why is this not easy? The GU10 halogen package is not exactly news to bulb makers. It's been around for years. It's _prime_ for replacement with lower power equivalents. So why...?