This is a set of 240 bright white LED (Light Emiting Diodes) snowing icicle chaser lights are designed for indoor or outdoor use and set to run in any one of the eight mode sequences pre-programmed into the built-in control unit so you can choose your favorite pattern or have them all scrolling through randomly. The term snowing means that these icicles lights turn off and on in a downward pulse to give an effect that looks like it is snowing. The use of LED's mean that bulbs do not need to be replaced and they also use less energy than traditional bulbs and give a brighter light too. A fantastic xmas decoration that will look great in your home or office.