On 07/05/2019 21:34, Mike wrote:

I'm installing a LED floodlight outside below a wooden soffit. It would
be neat for the cable to go up to the soffit into a junction box where
the 1mm2 lighting can enter from the loft. So in effect like a ceiling
rose, but waterproof. I haven't found a j/b that expects a cable entry /
exit from its mounting surface. But I bet one of you have.

--
let the dog out.

I can't think of the name, but you can also get some that come with a
gel filler for waterproofing. I've even got some somewhere, bought when
I thought they sounded like a good idea.