Wire Faceted C7 OptiCore LED String Lights provide a stunning glow and superior durability. The secret is the OptiCore bulbs which feature SMD LED technology. Commercial grade Opticore LED bulbs emit superior, exceptionally vivid light and last even longer than traditional LEDs. This Christmas light set comes complete with a commercial light stringer, featuring heavy-duty STP1 insulation and professional grade sockets for trouble-free wet weather performance. Whether displayed along your roof, outlining landscapes, or placed anywhere in your home, this OptiCore LED string light set will help you create a professional quality light display that you can enjoy for years to come.