The Commercial 25-ct. LED Mini Multi-Colored Lights with 4-inch Spacing can be used indoors and outdoors. With 8.3 feet of green cord these lights are ideal for trees or columns. These LED lights use Full Wave Technology which increases the brightnes s 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.Additional featuresFli cker-free Will not fade or flake UV-protected Energy efficient Full Wave Technology makes light 40% brighterLights require a power adapter to operate (included