I bought 4 last fall at a bargain - $15?
For marking paths or driveway borders thay are excellent.
They don't light but a very small area, so they won't do the same job as a wired
light system. I expect they will get better very quickly.
One item that might be of interest is the solar-powered motion sensor lights.
They put out a lot of light for a limited time. You can mount the panel away
from the light. About $80.
Rex in Fort Worth