optical led glass lens for led street lamp good heat resistance High transmittance reach 97%, less light loss ... Wide beam angle optical led glass lens for led street lamp Specifications:LED glass lens1,Part Number: KB-GL-78NA2 ... glass3,Beam angle: 90 degree, transparent surface4,Transmittance: 97%5,Working Temperature: -35°to +80°6,Dimension: 78*34mm7, Suitable led ...