Christmas lights string by TnS length 13.5m, with 240 led lights. They are green cable and emit cool white light, which is measured on the Kelvin scale with values from 5000K to 6800K. The tones of cool white are more blue compared to natural light. They have IP20 protection, which does not allow direct contact of our fingers with the lighting elements. They allow you to choose between various lighting programs, depending on your mood.. They operate with electricity.