It's fluorescent silicone made of silicone. Fluorescent silica gel is a very good thermal insulator. The silica gel used on automobile LED beads has excellent sealing performance and can protect LED chips. This silica gel for car lamps has the effects of high light transmittance, high refractive index and good thermal stability. At present, the lights on cars are generally LED lights, which are mainly used for external and internal lighting, with a life of 50,000 hours and a solid structure.