OptiCore smooth C7 light bulbs re-create the rich color and warm beauty of incandescent vintage lights, but with all the advantages of LED. The opaque lens is 115% thicker than ordinary bulbs and made of polycarbonate, up to 200 times stronger than glass. This makes OptiCore bulbs virtually unbreakable. The SMD LED diode inside the bulb saturates the lens evenly with vibrant light, giving these bulbs that old-fashioned glow from any viewing angle. And with an average lifespan of 60,000-hours, these are bulbs that will last for years. Get the energy efficiency and durability of LED with all the richness and color of old-fashioned lights in these OptiCore LED smooth/opaque light bulbs.