Add a touch of elegance to the outdoor atmosphere with the Copper Knights Line from Unique Lighting System Made from high quality, polished copper, the Copper Knights line is designed to withstand the test of time and look beautiful while doing it. By fabricating the fixtures from copper, Unique has created a long-lasting product that develops an attractive appearance naturally over time. The complex structure of copper changes when exposed to outdoor conditions, bathing the fixture's exterior in shades of blues and greens for a vintage and naturally aged look.