... transmittance 3) high temperature resistance 4)clear solar concentrator glass lens(GT-TYN01/01/03) 1)material: optical glass(borosilicate),K9 ... ,BK7,B270 2) light transmittance: 95%( coated lens can up to 97%) 3) size : 4) shape: aspheric 5 ... for big angle spotlight ,cars light,outdoor illumination,stree lamp,flashlight/torch light,wall washer ligh,tunnel light, table light,far ...