Our bulbs are dimmable for flexibility in mood lighting and give off a warm amber glow ideal lighting for gazebos, patios, pergolas, restaurants and more. Our string lights are made with commercial-strength, heavy-duty 16/3 SJTW cord that withstands extreme temperatures and wet weather for year-round enjoyment. Each 30 ft string light set includes 10 light sockets set 3 ft apart, 10 decorative clear incandescent bulbs and 5 spare bulbs. If one bulb goes out, the rest will remain lit. They're simple to install, easily connect up to 13 sets end-to-end safely. Decorate and illuminate your next festive celebration.