1.Pyrex gass 2. Light cover and lamp cover 3.Flat and Round lens 4.Moulded,Polished 5.No scratches Light cover and Lamp cover by Pyrex 1. Light cover material: Optical glass,Pyrex,Borofloat2. Techniques of Light cover: by Moulding,Grinding, Polishing3. Quality of Light cover : no scratches and air bubble; transparent4. Transimission of Light cover: around 92% for visible light5. Function of Light ...