The Commercial 25-ct. LED C6 Bright White Lights with 6-inch Spacing can be used indoors and outdoors. With 12.5 feet of green cord these lights are ideal for trees or columns. These LED lights use Full Wave Technology which increases the brightness of the lights by 40% over other LED lights. Rated at over 100000 hours of use these lights will not flicker fade or flake and stay cool to the touch. Water and weather proof the lights are designed to be virtually unbreakable. Regular white lights gi ve will give off a slightly blue tone appearing to some as periwinkle. The warm white lights have a warmer glow with a golden undertone and are the closest to a traditional non-LED white or clear light. Additional features:Flicker-free Will not fade or flake UV-protected Energy efficient Full Wave Technology makes light 40% brighterLights require a power adapter to operate (included