... index 1.474 Working Temperature -50-550 degree Light Transmittance 95% Photometrical curve round light shape Diameter 100MM View degree 45 degree Lens ... for integrated 30W-200W COB Led high /low bay light,factory,warehouse,mine,workshop,big toll station,gas station,stadium ... transparent, never get yellow 5.High heat resistant and high light transmittance 6. we can offer silicon gasket and metal holder ...