Thank you Sawzaw - those are a hell of a lot cheaper than in the UK. Over here I have found 12V sidelight bulbs (supposed to be output equivalent of the standard 12V 5W front or rear single filament sidelight bulb) with the mini-bayonet fitting, but what I am really hunting for is something with less than the 5W current draw, that fitting, and a higher output.


But I don't want a bluish light, and most of the car bulbs seem to be 4000K upwards. I don't like bluish headlights either: my eyes seem to see slightly yellower light better.


Moreover, direct comparison photographs seem to show the equivalents of the 5W bulbs as considerably dimmer (as well as considerably bluer).

So as an improved spotlight/reading light for inside a caravan (="trailer" in US English I think) those are not suitable.

I've tried hunting for the 21W equivalents, but again everything I have found seems to be too blue and too costly.

Xenons and halogens also seem not to exist with the right fitting.