Christmas lights string length 20m, with 200 lights led. They have copper cable and emit warm white light, which is represented on the Kelvin scale with values from 2400K to 3800K. The tones of warm white are more yellow compared to natural light. They allow you to choose between various lighting change programs, depending on your mood. They operate on solar energy, charging during the day and offering autonomous lighting at night, ideal for outdoor spaces without the need for power connection.