... 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,Material: Optical grade glass3,Beam angle: 90 degree, transparent surface4,Transmittance: ... , led downlight etc9,Certificates: SGS ,ROHSMechanical Characteristics:Application: optical led glass lens for led street lamp