40w flush mount led lighting 

What is a LED lens? There are 4 kinds of lenses for led lamps: 1. Silicone lens a. Because silica gel has high-temperature resistance, it is often used to directly package LED light-emitting devices. b. Generally, the size of silica gel lens is small, with a diameter of 3-10mm. 2. PMMA lens a. Optical grade PMMA (polymethyl methacrylate, commonly known as acrylic). b. Plastic materials, advantages: high light transmittance (about 93% when the thickness is 3mm); 3. PC lens a. Optical grade Polycarbonate (PC). b. Plastic materials, advantages: high production efficiency (can be completed by injection molding and extrusion); light transmittance is slightly lower (the transmittance is about 89% when the thickness is 3mm); 4. Glass lens Optical glass material, advantages: rich optical parameter characteristics (optional), high light transmittance (97% transmittance at 3mm thickness), high-temperature resistance, etc.; disadvantages: large volume and heavyweight, single shape, fragile, Ma…