Sheila wrote:
apologies as this is not exactly DIY.

My mum wants some light at the far end of her garden to assist her when she
walks her dogs of an evening. Doesn't have to be a lot of light, just a
glim to see the dogs by.
Their last walkies is around midnight to 1am, so some light would be needed
for 8-9 hours at this time of year.
Would 'push in the ground solar lights' be up to the job?

Some are really, really crap.
I've got one that dies in 2 hours (at this time of year, only 3 months old)

I've been playing with another idea.
Take a plastic 100mm high cup.
Take a 100mm focal length credit card magnifier.

Put lens on top of cup.
Put LED (or lines of LEDs) at bottom of cup.

This produces quite a sharp spotlight, 50cm at 10m.
A line of LEDs across the bottom of the cup would produce a 5m*50cm line
(at 10m).
Mount a few of these in a location, and how does your garden glow.