Square Warm White Solar Patio Umbrella Lanterns
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Inside each is a flameless candle that runs on the power gathered during the day from the sun.
They also come with stakes that you can set into the ground. You could put those in a part of your yard that gets direct sunlight during the day and pull them off to use in other places once they're charged.
They come as a set of eight and stand 5.2 inches tall.