Christmas lights string by Entac length 3m, with 30 led lights. They are transparent 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. You can adjust their operating time with the included timer.. They operate with batteries.