... long brightness 4.Excellent color rendering high power led optical lens1.processing:by design , molding , ... griding, polishing , inspection ,testing and so on .2.Material:PMMA3.Tansmittance 93%4.working life ... . 6.Application:street lights, tunnel lamps ,spotlight, flashlight ect . 7.Inside quality : clear , transparent , ... & Korea• Mainland China• Southeast Asia• Hong Kong/ Macao/ Taiwan• West Europe