Strada & Julia Lenses for Luxeon Rebel-ES Ledil Strada & Julia Lenses for Luxeon Rebel-ES are especially designed and optimized for Luxeon's Rebel-ES series of LEDs. These lenses were carefully designed to make light distribution as uniform as possible. Ledil Strada & Julia Lenses for Luxeon Rebel-ES are made of optical grade PMMA lens material with high UV and temperature resistance (105ºC / 220ºF), allowing for use in high current and temperature conditions. The Strada Lenses should be fastened to a heat sink with a PU foam adhesive tape of automotive grade, or fastened to PCB with appropriate, Ledil-recommended glue adhesive.