A.Glass lens design first depend on COB Led ,different brand COB Led such as CREE、lumileds lumileds、Bridgelux,Citzen, Sharp ,OSRAM、EDSION and so son ),its Led chip structure ,packing way are different, which cause the light effect has much difference when same glass lens to match different brand COB Led ,when design a glass lens ,should consider the brand COB Led, can get the actual effect

B. We Use TracePro , LighTools optc design software and Pro/E, SOLIDWORKS Mechanical Modeling software for design and optical simulation, and then constantly optimize to get the glass lens when clients want to get