Get the twinkle you love in Christmas lights, with the beauty and durability of OptiCore LED bulbs, in these commercial-grade C9 string light sets. OptiCore bulbs are made from polycarbonate, up to 200 times stronger than glass. They’re thicker too, giving the light from inside the bulb a timeless, elegant glow. Paired with a heavy-duty 18-gauge stringer, these are lights that will add festive twinkles to your holidays and special occasions for many years to come. Use them to wrap trees, outline your home, string along fences and decks, and more.