New Amazon Basics 24 Foot Outdoor String Lights. 24-foot commercial grade outdoor string lights, includes 8 LED Edison S14 shape bulbs; UL listed with 1 bulb every 3 feet With a life of 15,000 hours, the bulb will last over 13.7 years (based on 3 hours of use each day) With a correlated color temperature of 2700 kelvin, the string lights provide a soft white light, creating a warm ambiance for any patio, pergola or outdoor setting This LED string light uses only 8 watts of energy (1 watt per bulb) This string light costs only $1.93 per year to operate (based on 3 hours/day, 11 cents/kWh) making it an economical alternative to incandescent bulbs Durable, black cord