My mum wants some light at the far end of her garden
to assist her when she walks her dogs of an evening.

Must be a long garden... :-)

Doesn't have to be a lot of light, just a glim to see the dogs by.

LEDs mounted to the dog...
.... Unidentified Barking Object

Solar powered lights do not perform well:
o Siemens did some ok ones, but *barely acceptable*
o Most typical ones are very poor re basic economics
---- feeble solar cell, low quality battery (with memory effect)
---- low quality LEDs (which have quite a low output & life)
---- very low light levels re 1) winter overcast 2) winter sun

The simpler solution is:
o 12V feed from the house or outbuilding (shed)
---- IP67 transformer, cable, couple of lights
---- www.tlc-direct.co.uk have some
o House-mounted PIR pointing down garden
---- not 300W or 500W, but 150W will do

The PIR solution can be set to not shine on the next door's
property, and 150W will be ample yet not annoying. The 2D
type fluorescent items are unlikely to shine well enough, but
would be cheaper to run (28W for example vs 150W).
--
Dorothy Bradbury