... 97%, less light loss Wide beam angle glass led optical lens Specifications:LED glass lens1,Part Number: KB-GL-78NA2,Material ... : Optical grade glass3,Beam angle: 90 degree, transparent surface4, ... 78*34mm7, Suitable led brand: All brands COB LED .8,Suitable led light: led streetlight, led high bay light, led car light, led downlight etc9,Certificates ...