iBright commercial grade Garden string light is a very High grade of quality. We use SJTW weather proof cables with new None recycled raw material that can stand in heavy rain and winds. Each strand can handle up to 1400 watts combined. Highly durable with molded sockets. We use copper type terminals for better conductors . Sockets can come as E26 for North America or E27 for Europe & Australia Each strand has a Molded end connector to secure connect more strands Each one of our strand is checked twice for loose connections and conduction by our QC workers.