The OP-015 is a 20mm 15° round medium beam Multi-LED Lens made of PMMA (polymethylmethacrylate) to ensure excellent optical properties as well as long-term material stability and durability and has an optical efficiency of the lenses is 85% minimum. It is suitable for use with the Osram Golden Dragon LEDs. It is designed for use with all Lumileds Luxeon series of LEDs.