Asymmetric LED Optical Lens 135x85 Degree PC 18x10.05x7.55mm for Wall Washing Lighting It is a single-piece asymmetric optic in optical PC, measuring 18 x 10.05 x 7.55 mm and rated for 1W and 3W emitters. The 135 x 85 degree asymmetric distribution throws a wide band across the roadway and keeps the vertical spill short, so pole spacing can be planned without flooding house fronts with light. Transmittance reaches 93%, and the lens runs from -35 degrees Celsius to +90 degrees