In article ,
fred wrote:
Want to get some decent outdoor lights. Auto day light switching and
solar powered ideally but otherwise 12v as the run will be up to 100yds
with 5-10 lights on it

A long run means more voltage drop. And 12v takes more current than 240v
ones, so more susceptible. In other words, suitable cable for that run in
12v will need to be thicker therefore more expensive than mains.

But if they are solar powered, the source of that is going to determine
what you use anyway.

--
*Bills travel through the mail at twice the speed of cheques *

Dave Plowman London SW
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