Lunabrite Light Rope

This might work well to provide some accent lighting or define a space on your patio in the evening. The best thing is that the Lunabrite light rope does not require any electricity or battery power and is even safe in water. Unfortunately, the Lunabrite website is severely lacking in details about the product, but we would assume that collection of solar energy during the day is what provides the light at dusk.

-via Core77