How long do these lights stay on at night?

Runtime depends on how much sun the panel gets. On a full sunny day expect several hours of light; on overcast days they may dim early or not come on at all.

Do they need direct sunlight to charge?

Yes. The small solar panel needs several hours of direct sun. Shaded spots under trees or eaves will leave them dim or dark.

Are they bright enough to light a walkway?

They give a soft accent glow, enough to mark the edge of a path. They are not bright enough to light steps for safety or to replace a porch light.

How do I install them?

Push the stake into soft soil where the panel faces the sun. No wiring or tools are needed, and they switch on automatically at dusk.

Are they weatherproof?

They are made for outdoor use, but the plastic housing and stakes are light-duty. Heavy rain, frost or being stepped on can damage them, so place them off the main walking line.